View Cart
FITS 2016 Ford F-150
SMI Stay-IN-Play DUO Supplemental Braking System - Proportional
50 Dollar Mail In Rebate with Purchase of Complete Demco Flat Towing Setup: Includes Demco Tow Bar, Baseplate, and SMI Braking System

SMI Stay-IN-Play DUO Supplemental Braking System - Proportional

Item # SM99251

lowest price pledge

Retail:$1,257.82

Our Price: $1,049.95

Tow Bar Braking Systems
Confirmed to Fit
2016 Ford F-150

All models

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping

Shipping Weight: 12 lbs

Quantity: 
In Stock, Ships Today
SMI Stay-IN-Play DUO Supplemental Braking System - Proportional Hydraulic Brakes SM99251
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

In Use/Installed

Customer Photos


  • Brake Systems
  • SMI
  • Proportional System
  • Hydraulic Brakes
  • Fixed System
  • Power Assist Brake Compatible
  • One Time Set-Up
SMI tow bar braking systems for your 2016 Ford F-150 are available from etrailer.com. Installation instructions and reviews for your Ford tow bar braking systems. Expert service, and cheapest tow bar braking systems price guarantee. etrailer.com carries a complete line of SMI products. Order your SMI Stay-IN-Play DUO Supplemental Braking System - Proportional part number SM99251 online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (87)
  • Q & A (1190)
  • Videos (80)
  • Photos
  • Why etrailer?

2016 Ford F-150 - SMI Stay-IN-Play DUO Supplemental Braking System - Proportional

Get automatic, proportional braking with a system that never has to be removed, replaced, or reset. The DUO activates when your RV's brake lights go on and an inertia sensor in the towed car detects deceleration. No false braking.


Features:

  • Supplemental braking system applies towed vehicle's brakes in proportion to braking action of RV
    • Towed car's brakes are activated at the same time and with the same intensity as those in your motor home
  • Inertia sensor detects deceleration and signals system to activate brake pedal with proportionate amount of pressure
  • No false braking
    • Coach brake light must be on for system to activate towed car's brakes
  • Sensitivity control on the inertia sensor lets you regulate how aggressively the towed car's brakes activate
  • One-time setup - no need to remove or to activate each time you tow
    • Operating unit and actuating cylinder stay hidden so everything is out of your way when driving
    • Inertia sensor mounts in the cab of the vehicle
    • System automatically functions when towed vehicle is hitched to RV
  • LED coach notification system illuminates when the towed vehicle's brakes are applied
    • Connects to towed car's brake light switch to ensure proper reading
  • Vacuum pump restores towed car's vacuum after each braking event
    • Less force is needed to move the brake pedal in the car, resulting in more natural braking and less risk of damage
    • Compatible with vehicles that have continuous-power-assist brakes
  • Breakaway included
  • Necessary installation components and instructions included
  • Made in the USA


Specs:

  • Operating unit dimensions: 8" long x 5" wide x 2-1/4" tall
  • 5-Year warranty


A supplemental braking system is a must when towing a car or truck behind your RV. Without it, the weight of the towed car can create a safety hazard, strain your RV's brakes, or affect your RV's warranty. Most states require a supplemental braking system.


Automatic, Proportional Braking

There are many supplemental braking systems available to RV owners who choose to tow a car. Stay-IN-Play DUO combines the best features into a single system that is both automatic and fully proportional. This system relies not only on your towed car's momentum to activate, but also on your RV's brake light signal. As a result, the DUO will automatically activate any time you engage your RV's brakes, so long as there is enough deceleration for the system to detect. And when it does activate, your towed car's brakes will engage with an intensity that matches the slowing or stopping action of your RV.


An inertia-sensing mercury switch inside the DUO's controller is what makes this system proportional. This switch reads and interprets changes in forward momentum that occur when your towing setup decelerates. As your RV and car slow down, this switch sends a signal to activate your towed vehicle's brake pedal with an intensity that matches the deceleration of your RV. The result is even braking across your towing setup. Whether you lightly tap the brakes in your RV or apply them hard in a panic situation, your towed car's brakes will be applied proportionately.


Dual Activation Signals

G Force Controller

The G-Force controller is responsible for sending the signal that activates the brakes in your towed car. When the coach brake lights come on, the tow bar wiring sends a signal to this controller. This signal powers the internal, inertia-sensing mercury switch, enabling it to detect deceleration. If a change in forward momentum is detected, the G-Force controller initiates the braking process by sending an activation signal to the system's operating unit.


If the mercury switch is powered but there is no change in momentum, the system will not activate the towed car's brakes. Likewise, if a decrease in forward momentum occurs but there is no brake light signal from the RV, the inertia sensor will not be able to register the deceleration, and the system will not activate the towed car's brakes.


Because the DUO will not work without your RV brakes being applied, there is no false braking. When you downshift in your RV without applying the brakes, the DUO will not mistakenly depress your towed car's brake pedal because that first activation signal is not there. And because there is no time delay, this proportional system delivers instant braking in an emergency.


Note: The G-Force controller mounts in the towed car and must be pointed it in the direction of travel - with the toggle switch facing the rear of your vehicle - for the internal sensor to function properly.


Sensitivity Adjustment

You can adjust the sensitivity of the inertia-sensing mercury switch with a knob on the front of the G-Force controller. Adjusting the sensitivity lets you decide how intense the change in momentum must be for the sensor to respond. Adjust it to fit your personal preference so that you can get a customized braking experience. Set the sensitivity low and the DUO will only respond when you forcibly step on your RV's brake pedal. Set the sensitivity high and it will respond when you merely tap your RV's brakes.


To fine-tune the sensitivity, first move the knob all the way to its most sensitive setting. From there, you can apply the coach brakes and gradually move the knob until you get the setting right where you want it. You only need to set the sensitivity upon initial setup.


Permanent Installation with Concealed Components

Operating Unit

The operating unit receives the signal from the G-Force controller to activate. It then delivers air through a hose to the actuating cylinder, which depresses the towed car's brake pedal with a pressure that ensures your car will brake in proportion to the deceleration of your RV.


DUO Under Hood

Once you install the Stay-IN-Play DUO's operating unit under the hood of your towed vehicle, it stays concealed. Not only will it be installed and ready for the next time you want to tow your car, but it will also be out of the way so that you won't notice it when you drive your car normally. In addition, there is no need to constantly set up or remove this system. As a result, you don't need to worry about where to store the components when you're not towing.


Actuating Cylinder

Small Cylinder

The actuating cylinder depresses your towed car's brake pedal upon receiving air from the operating unit. This small cylinder stays mounted on the arm of your towed car's brake pedal at all times and will not interfere with braking while driving.


Actuator on Pedal

Mount this cylinder so that it is perpendicular to the firewall when you depress the brake pedal. A clamp anchors the actuator to the firewall.


To connect the actuating cylinder to the operating unit, you will need to run the included air hose through your towed car's firewall. You can usually create the necessary, small opening without drilling. In most instances, you can cut a slit in the hood release cable grommet. Simply cut the end of the air line at an angle to poke it through the slit.


Vacuum Pressure Creates Smooth Braking

Normally, when you activate the brakes in your vehicle, a vacuum multiplies the pressure you apply to your brake pedal, creating the force necessary to stop the full weight of the moving car. On most cars and trucks, this vacuum-assist function does not work when the engine is off. As a result, many supplemental braking systems on the market have to use an excessive amount of pressure to effectively depress the towed car's brake pedal.


The Stay-IN-Play DUO's operating unit ties into your car's vacuum line and uses a built-in vacuum pump to activate the vacuum-assist function of your car's brakes when it's being towed. As a result, the actuating cylinder of the Stay-IN-Play DUO does not need to apply extreme force to the brake pedal to achieve proper braking. The Stay-IN-Play DUO will replenish your towed car's vacuum after each braking event so that you will get smooth, even braking every time.


Built-In Safety Features

Most supplemental braking systems have methods of letting you know you when the system itself is activated, regardless of whether the towed car's brake pedal is depressed. Such setups leave opportunities for false notification. The Stay-IN-Play DUO's system is different. This system's LED monitor connects to your towed car's brake light switch. When your car's brake light goes on or off, so does the notification light. So you can tell whether your car's brake pedal is depressed.


You can install the monitor light on your RV's dash, or you can save time by attaching the monitor light to the back of the rearview mirror of the towed vehicle. This way you can see the light from your RV's backup camera or rearview mirror. The system includes the necessary parts for either installation method.


Note: If the towed car's brake lights do not illuminate when its engine is off, then a stop light switch kit (sold separately) is required for proper notification.


The breakaway system ensures that your car will come safely to a stop if it accidentally detaches from the RV while you are towing. A switch mounts to the front of the towed vehicle. This switch - which is wired into the operating unit - includes a pin that connects to your RV's hitch receiver with a breakaway cable. If the car separates, the cable pulls the pin from the switch, causing a signal to be sent to the operating unit.



9599006 Stay-IN-Play DUO Supplemental Proportional Braking System by SMI

Replaces SMI SM99251



SM99251 Installation InstructionsInstallation Details SM99251 Installation instructions

Video of SMI Stay-IN-Play DUO Supplemental Braking System - Proportional


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for SMI Stay-IN-Play DUO Braking System Review

Today we're going to be taking a look at the SMI Stay In Play Duo Supplemental Braking System, part number SM99251. This is an automatic proportional braking system that never has to be removed, replaced, or reset. The duo will activate when the RV or tow vehicle brakes are on. There's a switch in the car that detects braking. With the sensitivity controlinertia sensor set inside the vehicle, you can adjust more or less braking, depending on the weight of the vehicle. Let's go over our components for the Stay in Play duo system.

This is the control unit. It also has a vacuum pump built inside. The control unit, we get wired to the break-away switch in the operating unit. The long, black hose that comes out of it is for vacuum assist that will connect to the vehicle's vacuum, typically in front of the brake booster. Provided with the install kit will be the necessary adapters, check valve, and air line T to connect the vacuum assisted hose. The control unit here, has the built-in inertia switch and the on-off switch that will get set inside the vehicle; the label here will face the passenger's side, so that the inertia switch is set in the proper position.

It will connect to the operating unit in the vehicle's tow wiring. Another important component here of the Stay in Play system is the break-away switch. The break-away switch is to act in emergency situations, and will automatically throw the braking system into full on, when the switch or pin is pulled out. This will get connected to the tow vehicle, in the case of a break-away or major emergency. Here, we have the actuator that will pull on the towed vehicle's braking pedal, to create the braking. This is an anchor point that will use a self-tapping screw to secure it to the firewall.

Built into it is a clamp and bracket setup that will go around the arm of our brake pedal. Connected to it to operate the actuator will be the hard plastic line that will connect to our vacuum pump from the operating unit. Here is our indicator light that will mount inside the towed vehicle, so that we know when the brake pedal is being depressed. Along with our install kit, we'll have the necessary quick-splice connectors, butt connectors, and ring terminals. Even a quick-splice tap to connect as necessary, and then cover our wires and secure them as necessary, as part of our install kit. Here's the SMI controller.

Again, we have the on-off switch. We'll flip it to on. The mounting location for each of these components will vary from vehicle to vehicle, but we have to make sure that our controller label is facing the passenger side. This application, we've mounted in the rear cargo area. Another good location would be the front kick pannel near the hood release. The operating unit for this vehicle, we've mounted inside and underneath the driver's front seat. We'll slide the seat forward; we'll get a better view of the box. You can also see the vacuum and air line that come out of the front. This will complete the review of the SmI Stay in Play Duo Supplemental Braking System, part number SM99251. .


Customer Reviews

SMI Stay-IN-Play DUO Supplemental Braking System - Proportional - SM99251

Average Customer Rating:  4.8 out of 5 stars   (87 Customer Reviews)

Get automatic, proportional braking with a system that never has to be removed, replaced, or reset. The DUO activates when your RV's brake lights go on and an inertia sensor in the towed car detects deceleration. No false braking.

- SM99251
by:

As a result of changing motorhomes, we had to switch from an Air Force One breaking unit to a Stay ñ Play Duo. Thanks to the video provided? by etrailer.com, the change over was VERY EASY. We really like how the new system works. Setup is so straight forward. Thanks etrailer for all your support. 639931



- SM99251
by:

I have found a couple of things I am not pleased with. First is the toad vehicle it kills the battery. My dummy key is on the on- position not in accessory position. The second is led lights when brakes are applied in this Arizona sun you cannot see them, at night they are fine. 604938



- SM99251
by:
2017 Ford Focus

My order from etrailer arrived already today, Saturday! I only placed the order on Wednesday. The website was so user friendly and easy to navigate in helping me find the correct products to purchase to make my vehicle flat towable. When I forgot a very important, albeit small item, I called the 800 number. Preston helped me cancel my original order and then duplicate it, adding the new item to my order so that I would not have to pay for separate shipping. I'm looking forward to having the whole system installed and using it to tow my car with my Class C RV. I would definitely order from etrailer again with all confidence. 562939



- SM99251
by:
2004 Honda CR-V

Had I not gotten a DVD from someone else, where the install was thoroughly demonstrated, the written install instructions would not have been enough to do the job. Needs better instructions for installation. Have not tried the new SMI Duo yet but have heard good things about it. 517258


Comments

On the product page, whe have numerous product installation videos that will give you a good idea of what the installation will involve.

-- Mike L - 06/05/2018

39285

- SM99251
by:
2009 Ford Explorer Sport Trac

Easily installed this product myself in about6 hours. This braking system has worked extremely well for me, after using it for over 12000 kilometres, including two trips from Canada to Arizona and then California. Only takes a few seconds to set up , then tow safely. Fully recommend this product, as it gets put in place once, then it is always ready. No need to assemble or remove anything for normal driving operation. 572173



- SM99251
by:
2015 Jeep Wrangler

I was a little intimidated by all the parts and different components of installing this product myself, but I decided to give it a try on my 2015 Jeep Wrangler. I did the installation in my garage with just basic hand tools and a cordless drill. I watched the videos from etrailer on different installation applications and then used the written instructions as a guide. The compete install took me about 5 hours and wasn't too bad for someone with average mechanical skills. The only problem I encountered was when attaching the clip for the cable on the brake pedal solenoid to the firewall. The self-tapping screw included with the kit did not hold the clip in place so I had to use a bolt through the firewall with a nut and washer. Ordering and pricing through etrailer was excellent and Heather at the order desk was very knowledgeable and professional. I received my order very quickly (3 days) and I will definitely order from etrailer in the future. 381273



- SM99251
by:
2015 Jeep Wrangler

This braking system is as easy to activate as flipping a switch. Now the installation, on the other hand, is a project! But, well worth the effort, since an alternative (non-installed) product would be cumbersome having to be positioned and stored in the vehicle. I have a 2015 Jeep Wrangler and the space in the engine compartment is rather tight. I had to fabricate a strap or two to secure the under hood equipment You need to be rather handy with tools and willing to dive in to get it done, but the results are great. The brakes of the towed vehicle apply proportionately without jerking. I did, however, by the radio transmitter-receiver to indicate that the brakes were indeed working because I found that the light supplied with the braking unit was not easily visible in the rear camera of the motorhome. I am happy with this product. 338459


Comments

I am still very satisfied with this braking unit. Since I installed it on the Jeep, we had incurred a rather abrupt panic stop with our motorhome with the Jeep in tow, and the Jeep tracked straight with no bad events. Without the Jeep brakes in operation, I am not sure that we would have avoided a collision. Great product!

Skip A - 02/03/2018

34176

- SM99251
by:
Jeep Wrangler

The Smi Stay-IN-Play DUO is a great product. I bought and installed it on my Nissan Frontier PU last year. I sold the PU and bought a Jeep Wrangler in October this year. I transferred the unit to the new Wrangler and installed the unit under the front seat and it worked out perfectly! The unit is so easy to use and works extremely well on the Jeep! 321595



- SM99251
by:
Jeep Wrangler

I selected the SMI Stay-IN-Play Duo system after comparing it with the Blue Ox Patriot. The SMI unit has performed as advertised...setting up for towing our Jeep Wrangler Unlimited is as easy as it gets. I didn't want to deal with the hassle and uncertainty of the Blue Ox controller floor placement. After connection to our Winnebago Vista, you flip one switch, attach the LED brake indicator to your rear view mirror, do a brief light check and you'really good to go. I had only one issue that needed attention. While towing, I would intermittently blow the fuse link with the SMI controller unit in the Jeep. A quick call to SMI suggested the solution. Apparently some SMI units needed a slightly higher amp fuse due to the the initial power draw from the vacuum pump when braking. I replaced the stock fuse...15 amp if I recall...with a 20 amp and no more issues. SMI customer service is great and I'm very pleased with my decision! 345933


Comments

Still performing as expected! 5k trip to Colorado and back. Up and down the Continental Divide with no problems. Still the best supplemental brake system for me...both in ease of activation at the RV Park and operation during the drive.

Craig G - 02/26/2018

35137

- SM99251
by:

Not being overly mechanical I had the braking system installed in a shop. Once installed and set up you literally do not feel any difference in the amount of braking applied to stop the motor home with the toad attached. Nothing to unbolt or re-install every time you use the tow vehicle is nice. One minor complaint is that I was not advised that the wiring kit needed to wire the taillights in the toad to the motor home braking system is not included and had to stop the installation midway to go out and locate the missing item. Very pleased with this product 184591



- SM99251
by:
Jeep

Everything installed without any issues. I'm very particular so it took 2 days to complete everything. I'm sure a pro could do it much faster. Have towed the 4" lifted (and loaded) Jeep accross the Rockies about 6 times and everything is working perfectly!! Very happy camper!! 301005



- SM99251
by:

It wasn't easy to get everything installed in a way that looked neat and professional but in the end the ease with which you can hook up the car and start towing makes it worth it. I bought a replacement factory vacuum pump line so that I didn't have to worry about ruining the original one and as a result the installation looks that much better. Literally all I have to do is flip a switch once the car is connected and I'm ready to go. Given a second opportunity to do the installation I would mount the LED light strip vertically on the backside of the rear view mirror to make it a bit more visible but other than that, I'm happy with how it turned out and the system works great. 590065



- SM99251
by:
2014 Honda CR-V

I chose the DUO Stay-in-Play brake system primarily because of a review that convinced me it would be easier to install than my first choice, the Invisi-brake. The overall installation was fairly easy with the great Video that stepped you through the process specific to the 2014 Honda CR-V. There's no way to properly praise the Video. Without it I could not have done the install. There is little to offer in the way of suggestions for improvement, but there were a few moments where things were difficult. If it is possible, without great difficulty, I would suggest including instructions on how to remove the driver's seat, or at least tip it backward, so that one can access the under-dash area easily. Also, I would revise the anchor procedure for the brake actuator to use a through-the-firewall bolt with a fender washer and locking nut instead of the sheet metal screw now used. The firewall metal is just to thin on the majority of vehicles to hold for very long with these forces in play. As much trouble as it is to install this anchor one would be better off to do this right the first time. The Honda CFR-V metal was so thin the sheet metal screw stripped out immediately, requiring the use of a bolt through the firewall. Reaching such a bolt is difficult, but not impossible with the air cleaner cover removed. So far, brake adjustment has been easy and brake is functioning as expected. So long Buddy Brake! You are a good product and have served me well for about 15 years in 3 rigs, but I am tired of taking you in and out!! 271482



- SM99251
by:
2015 Jeep Wrangler

SMI Stay in Play Duo installation in 2015 Jeep Wrangler Unlimited – Packaging was great with everything needed included plus extra items for various installation methods of you’re choosing. Upon initial investigation and survey, everything except the CD Information pack was accounted for. No big deal, as I had previously watched 2 different Youtube installations found on the internet. In fact, the internet videos were what I used as my step by step installation process, and the written instructions were only used for concerns where the video may not have been as clear as I had hoped for. Understanding that everyone has their own style and methods for doing this project, I purposely was not in a hurry to rush through it. All in all, I took @ 8 hours to install the Adapter 4 to 6 pole #30637, the EZMount Tow lights Kit, and the Stay in Play Duo Braking System. I choose the EZMount because I didn’t want to mess around with the OEM taillights and wiring. Magnetic lights don’t work so well on composite tops and I didn’t want to stick them to the sides of te Jeep, so I modified the EZ mount to wrap around the thickness of the rear glass hatch on both sides. I added a 2”x 4” pc of Velcro on the inside of the glass hatch and the mating surface of the plastic light housing - to hold the lamps in place until the rear gate was closed. I ran the wire harness on the inside under the trim all the way up to the front and through the grommet in the firewall. The flat 4 wire was routed and secured up to the Adapter 4 pole to 6 pole that I had fastened to the Blue Ox base plate. The actual installation of the SMI unit and assorted parts went rather smoothly. Most difficult issue was the lack of working space in front of the driver’s seat area. Installing the screw that holds the G force controller on the front (the side towards the front of the car) was difficult as it was almost a blind installation due to lack of room. The nut and fender washer used through the fire wall for attaching the air cylinder cable bracket was a challenge to reach - tight fit with not much room for one's hand and arm. Other than that, no big surprises – just a lot of tedious steps to do when you want to be sure that it is being installed properly – take your time and don’t be in a hurry. Once everything was installed – it all worked when I checked the system out. The only thing that may seem a bit odd is that when setting the G force initially, the compressor will shut off while adjusting per instructions. To do this initial adjustment, the wife stepped on the brake in the Motorhome, with the switch “On”. The compressor starts, and the brake is pushed down by the Air Cylinder, at which time I slowly adjusted the G force until the compressor shuts off. I secured the adjusting bolt and I told the wife to take her foot off the brake and then re-apply them. The compressor did not start again and the air cylinder did not apply the brakes in the Jeep. After setting the G force per instructions, the unit didn't turn on when the brakes in the Motorhome were applied - but since we were not moving - all I can assume is that the brake system will function while slowing down once the accelerometer setting (the sensitivity setting on the G force box) has been met. I assume that the sensitivity setting method includes a way to ensure the Jeep brakes are not engaged too frequently and only until needed. This is the only step that is a tad bit confusing without an explanation as to what to expect once the G force sensitivity is set. Lastly, I checked the brake away switch and it turned the compressor on and applied the brakes as expected. Overall - the installation went rather smoothly. Can't wait to see how the product works once we hit the road. I'll check back and provide an update later. 446684


Comments

Still working as expected, trouble free and no problems since the install.

Mike A - 10/23/2018

44940

- SM99251
by:
2017 Jeep Cherokee

I ordered all the parts required to safely flat tow out 2017 Jeep Cherokee Trailhawk from ETrailer.com. The only part they didn't have was the Mopar Flat Tow Enhancement kit Jeep requires to flat tow this model. Ordering from them was great, the website is easy to use and I was able to locate all the pieces compatible with my specific vehicle. The expert recommendations help my decision choosing the right parts. I ordered from ETrailer even though I found some of the parts on other websites a little cheaper. I chose to pay a little more because of all the effort ETrailer has put into installation videos and guides. I was very pleasantly surprised to learn from ETrailer that they have a price match guarantee! So my equipment consisted of the following Mopar Flat Tow Enhancement Kit (from Jeep) Roadmaster Battery Charge Line Kit for Towed Vehicles Mighty Cord 7-Way RV Style Trailer Connector - Trailer End WesBarg 7-Way, RV-Style Connector w/ 6' Long Coiled Cable Trailer End Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End Hopkins Custom Tail Light Wiring Kit for Towed Vehicles SMI Stay-IN-Play DUO Supplemental Braking System Roadmaster Brake-Lite Relay Kit for Towed Vehicles Blue Ox Alpha Tow Bar - Motor Home Mount - 6,500 lbs Blue Ox Base Plate Kit - Removable Arms Blue Ox Tow Bar Cover - Aladdin, Aventa LX, Aventa II The installation videos are great but not all inclusive. Take the time to read the instructions that come with the parts. This is a major project, I took about 30 hrs over a full week but as you'll see in the pictures I took s few extra steps to make a cleaner look. Some of those extra steps: The base plate install requires the bumper be modified cutting off a flange on each side, I spray painted this to prevent corrosion. In the install video of the baseplate on the drivers side they use an extra quick link (not included) to run the safety cable around the wiper fluid reservoir. I took the time to remove it and run the safety cable behind it. I didn't want our nice new vehicle to look like it can be towed so I played the brake away switch and 7 way trailer plug behind the license plate, so when not being towed our vehicle looks great! Some things to be aware of. The Brake air cylinder that mounts to the brake pedal with four bolts may need longer bolts, it did on our Jeep. Spend the money for weather tight heat shrink crimp fittings. The Hopkins wire harness was about 1.5 feet short to get to my plug location. Buy extra zip ties, electrical tape and split loom. I recommend reading all the various installation manuals and watching all the videos because the various components integrate together and if you install one at a time you'll be doing a bunch of extra work. The brake light relay is a real pain in the butt, not because of the hardware but because of the location of the brake light switch which is very hard to get to. Overall I am very happy with the products and how the installation looks. We haven't towed it yet but do not expect any problems. 410273


Comments

Still very happy with our purchase. We’ve towed over 10k miles and have had zero issues with our tow setup. I’ve shared my experience with several other RVrs and recommended your company for their needs. Thank you

Roy - 07/30/2018

41670

- SM99251
by:

I selected this item as an alternative to braking systems that sit in front of the driver seat and must be put in and taken out each time it is used. I like the fact that it is nearly undetectable once installed and works seamlessly. On installation the most difficult part was drilling the holes to screw the unit under the driver seat. The carpet being the primary problem in my experience, as it bound up around the drill bit. 554291



- SM99251
by:
2016 Ford Edge

Thanks to installation videos provided by etrailer, I felt confident that I could do the install myself. I had never pulled off moldings and panels in a car before, but with your videos as guidance , it was a breeze. This system was going into a 2016 Ford Edge 3.5L AWD and your (and SMI's) instructions call for installation of 2 check valves. After calling SMI to clarify the install points, it got even easier, as only one valve is required, and is ridiculously simple to install it. No cutting of original car hoses required (see photo). After everything was installed, the whole setup just simply worked, no troubleshooting required. That was fun and it is totally doable, even for the average guy like myself. 403633


Comments

The rear-view camera display in my RV is not good enough to show the operation of the brake notification LED which is applied to the rear-view mirror in the towed car. I installed a small light in the RV dash and ran wiring all the way back to the toad, with a disconnect plug at the hitch, of course. Now it is easy to see when the car brakes come on. Else, the system works great.

Herbert M - 07/13/2018

40888

- SM99251
by:
2003 Subaru Outback Wagon

I chose to go with this unit because I didn't like the idea of the other types that mash the brake pedal without any vacuum assist & the fact that you have to remove, then reinstall them each time you want to use the car. This ended up TOUGH install. Not because of the unit, but rather the lack of ANY room under the hood on my 2003 Subaru Outback Wagon to mount the operating unit. The only place I could find that would be out of the way was under the driver's seat of all places! Luckily there was JUST enough hose with the unit to reach all the way to the brake booster. I had to cut the carpeting so the seat would clear the operating unit during movement without any chance of contact. There was no hole in the firewall large enough to accommodate the hose so I had to drill a hole for that although I was able to route the wiring through a small rubber grommet. Routing the hose to the firewall was a real challenge! I ended up running it through the heater duct under the driver's floor mat to the left side kick panel, then up over the pedals keeping clear of any moving parts. WHEW!! The brake pedal actuator went on without much fuss, although with my large feet I have noticed I'll catch the actuator with my toe on occasion. I may mark the location it's in now & merely raise it up a tab in between trips. The wiring was pretty much straight forward, there was plenty of included wire & I had JUST enough room tho mount the G-Force Controller on the left kick panel covering without interfering with my feet. The breakaway switch I fastened to the body in front & below the radiator. I read where everyone was saying you need to have a battery cut-off device to keep the braking system from draining the battery over time, but I had power from the RV keeping the battery fresh so I didn't worry about that & saved myself the $180 for the cost of an automatic battery disconnect. After installation, I sat in the car while we towed it around the neighborhood to see how it worked & made the necessary adjustments to the G-Force Controller. Now THAT was weird! What with the car steering itself & braking too. We just got back from a 4,000+ mile trip & everything worked fine. On occasion I forgot to flip the switch to turn the system off, but it didn't seem to make much of a difference. All in all a great system! 188067



- SM99251
by:
2018 Chevrolet Spark

I have always had great customer service with etrailer. Spent a lot of money. I bought the complete towing package for my 2018 Chevy Spark. Everything looks great. 551954



- SM99251
by:
2015 Subaru Forester

I ordered an entire setup to flat tow my Subaru with my RV. Having never done this before I was nervous about missing something I might need. etrailer made it very easy when I called them on the phone. I told them what I was trying to do and they made sure I had everything needed to complete the job. I was given a name and phone number to call the same person if I had any issues. When one of the boxes was opened it was missing two pins from the manufacturer. A quick phone call and they had them in the mail in a matter of hours. This kind of personalized service is missing in our ever changing world. It was a pleasant surprise to find it here. Great Job etrailer. I will favorably recommend to everyone. 493015



- SM99251
by:
2012 Dodge Charger

I installed this in a 2012 mini Cooper S. With the turbo charger there is no room in the engine compartment for the system unit, so I mounted it under the passenger seat. I had to remove the seat, cut out the carpet, mount the unit, and then buy longer seat attachment bolts. I used half inch thick spacers between the seat track in the floorboard. Made a long run for the vacuum hose to get up to the engine compartment through the firewall. By removing the cowling on the driver side, it exposes a huge Gromit where the main wiring harness passes through the firewall. It actually had two nipples ready to be cut off to run the vacuum hose and the wires through — so that part was pretty easy. I haven’t towed it behind the motorhome yet, but it passed all the start up tests the first time! 474484



- SM99251
by:
2018 Jeep Wrangler

After doing much research and reading many reviews and watching a lot of your instructional videos I chose the Stay-in-Play Duo. It came complete with instructions and extra parts for any application. I like the fact that after everything is installed it is just a matter of flipping a switch and checking it out and drive off. I mounted it in a 2018 Jeep wrangler, not very much room for the operating unit, but I I went off of one of your videos on a 2017 Jeep Wrangler Unlimited and mounted it underneath above the cross frame below and behind the radiator but still protected from the elements. Not a lot of room under the dash either, but everything is in and looks great and ready for the 1st trip. 518348



- SM99251
by:

Easily installed, the installation video is very helpful 660685



- SM99251
by:

Great product! Easy to install and use! 660056



- SM99251
by:

The installation was not difficult but time consuming. Took about 4 hours. The video one etrailer made it it very straight forward. Thanks etrailer! 657503



- SM99251
by:
2015 Jeep Wrangler

Great product. Took a while to install, but not difficult. Installed it in a 2015 Jeep Wrangler 2 door. Just completed a 5000 mile RV trip towing the Jeep. System worked great. I installed the brake pedal LED lamp in the RV on the dash and ran the wire thru the Jeep 6 pin & RV 7 pin connector. It lets me know when the Jeep brake pedal is depressed by the stay-in-play system. I did use a brake lamp relay to isolate the Jeep brake pedal switch from the brake lamps with the key off. Battery drain was minimal as the system uses very little power. simple to use, flip the switch on. simple to adjust with the lamp in the RV indicating when brake pedal is depressed. 643732



- SM99251
by:

Self installed. Online videos were a help. Would recommend. 643045



- SM99251
by:
Jeep

system works great once you get everything hooked up. no wireing dia. were available for the new jeep JL 635275



- SM99251
by:

Everything is doing very good. 635108



- SM99251
by:
2019 Jeep Cherokee

So far, works as advertised. However, this was a very long and tedious install. If you buy this and install yourself, make sure you take your time. Also, you'll be cutting into the vacuum line for the brake booster system. When you do this, do not forget the check valve. 620325



- SM99251
by:
2019 Chevrolet Equinox

Shipped on Time. Arrived on time. Easy to install by my RV dealer. However, install may be a little harder if first time install. It will be used on my Chevrolet Equinox behind my RV. Appears to work as described as I have only used it one time. The only issue the RV service center had was the length of the bolts to hold the cylinder to the brake pedal. The bolts were too short. 613320



- SM99251
by:

Can’t review the brake system yet as it will take some installing. But etrailer continues to amaze. Product arrived less than 24 hours after ordering and appears to be undamaged. The product information available online is amazing and made my selection simple. 612117



- SM99251
by:

Excellent braking - trouble-free system. I love it!! 608541



- SM99251
by:
2010 Lincoln MKX

Good quality product. It is a very convenient and functional braking system for your car. Once installed, you can't beat it with any other system I have seen. I would rate the install as a 9.7 out of 10 (with 10 being the most difficult). Most handy people will have significant trouble with this installation. etrailer.com had a video of the installation on my exact vehicle (2018 Lincoln MKX). I installed for 3 days while watching a 20 minute video. Got hung up on one step and a phone call to a helpful technician solved the problem. Excellent customer support. 606336



- SM99251
by:
2013 Jeep Wrangler

With basic mechanical ability, I was able to install the product myself and it has worked as expected. The only negative point is the indicator light is not very visible in the rear view camera of the motorhome. 605001



- SM99251
by:
2012 Saturn Relay

Will i need the brake lamp relay # RM-88400 as well with my 2012 rubicon? 603891



- SM99251
by:
2005 Jeep Liberty

I'm very pleased with this Stay-in-Play /DUO Braking System which I installed on my 2005 Jeep Liberty. I debated wheather I dared install it myself, but with the video instructions I decided that I could. I watched the video a couple of times, then followed it step by step during the installation, and it went pretty smoothly. One issue I had is that they changed the instalation of the LED indecator light, since the making of the video, so the parts did not come as described on the video. I do prefer the new method, as described in the installation manual, but it does require a toggle switch to turn it off. I installed one just below the Control Unit inside the car (see photo). I was also very impressed since, right after ordering the system, I found it for less on another web site. I emailed eTrailer about my disappointing discovery, and they credited me back the difference. GREAT COMPANY! 589378



- SM99251
by:

Product is great the help video from etrailer fantastic. Shows how much they want to help their customers. Much appreciated. 586518



- SM99251
by:
2013 Subaru XV Crosstrek

This is a good company to deal with. The customer service is excellent and the products are as described. I'll be shopping more here. 586484



- SM99251
by:

Installed and performing as intended one year later. Great dealing with etrailer—-fast-efficient-and knowledgeable. Will buy from them again. 583937



- SM99251
by:

Was exactly what I wanted. The sales person knew their products and was extremely helpful. If ever i am in need of additional parts i will use etrailer.com. 583769



- SM99251
by:
2007 Saturn Aura

Great service. Outstanding delivery time. Very helpful customer service. 575141



- SM99251
by:
2015 Jeep Wrangler Unlimited

I ordered base plate, tow bar and all the goodies to hook up to our RV. Very good service and everything was delivered in 3 days. In the process of installing now. I have ordered parts from etrailer before and they have always been very good. 574356



- SM99251
by:
Fiat

This was a great product. With the flip of a switch, I went from normal drive to assisted break towing. From a user point of view, it could not have been easier. The break-assist indicator was located on the dash and therefore seen in the rear camera of the motorhome. I had it installed on a Fiat 500C. While a small lite vehicle, with the braking system, I towed it easily throughout the Rockies and coastal mountains from Oregon to Southern California. Simply a great product. 554603



- SM99251
by:

Not fun to install, but my questions were quickly answered by SMI. Results are great. There is no evidence of the system inside the toad as the control box was hidden in the console. The best way to go if you want effortless connection. No box to place in the driver location in order to tow. Nothing to remove when you want to drive the towed vehicle. 554020



- SM99251
by:

Works as advertised. Installation took me a while to do but I'd select this product if I had to do it again. Etrailer online installation video was invaluable. 552030



- SM99251
by:

They had the hard to find part and also at the best price. And topped it off with fast shipping. Thank you. 545425



- SM99251
by:
2018 Chevrolet Silverado 3500

I got the best price on the internet and free shipping. Some places wanted 999-1200 I got it for considerably less with free shipping 538925



- SM99251
by:

The attachment of the pulley fixture to the firewall is a bit of a hassle as the self tapping screw has a tendency to round out the hole. Recommend drilling and using a different very short screw so as not to penetrate very far through the firewall. 530109



- SM99251
by:
2016 Toyota Sienna

After 1 year it's working well. Absolutely no problems with the unit. I particularly like that you can hardly tell it's in the car. 523970


70
107
Show More Reviews

Ask the Experts about this SMI Tow Bar Braking Systems
Do you have a question about this Tow Bar Braking System?


  • Parts Needed To Flat-Tow a 2019 Chevrolet Spark LS With Manual Transmission
  • In order to flat-tow a 2019 Chevrolet Spark LS (Manual Transmission) with all four wheels on the ground behind a motorhome you are going to need a tow bar, base plate kit, safety cables, tail light wiring harness, supplemental braking system, and possibly a high-low adapter. There may also be a few other smaller components that are needed depending on options the vehicle is equipped with. For a tow bar, I recommend the Roadmaster Nighthawk All Terrain Tow Bar part # RM-676. The Nighthawk...
    view full answer...

  • Recommended Parts Needed to Flat Tow a Jeep Wrangler JL or JL Unlimited
  • For your Jeep Wrangler JL, I recommend starting with the Roadmaster EZ5 Base Plate Kit # RM-521450-5. This kit has removable arms to give you a very clean look when not flat towing your Jeep, and also gives you a clean connection to your tow bar when towing behind your motorhome. I recommend installing this base plate using Loctite threadlocker # LT37420 to keep your hardware from vibrating loose over time. For your tow bar, I recommend the Roadmaster Nighthawk All Terrain, Non-Binding...
    view full answer...

  • What do I Need to Flat Tow a Jeep Wrangler JK with Factory Bumper
  • To flat tow your Jeep Wrangler JK behind your motorhome, you will need a base plate kit, tow bar, safety cables, tail light wiring harness, and a supplemental braking system. Depending on the year of your Wrangler, you may also need a Brake-Lite Relay, # RM-88400, (2012, 2013, 2015-2018) or a Stoplight Switch, # RM-751452 (2007-2011, 2014). For your base plates and tow bar, I recommend using the Roadmaster Direct Connect Base Plate Kit, # RM-521448-5 for 2010-2018 or # 1429-3 for 2007-2009,...
    view full answer...

  • Difference Between Roadmaster EZ4 and EZ5 Base Plates for 2017 Jeep Wrangler Unlimited
  • Both the Roadmaster EZ4 Base Plate Kit # RM-521448-4 and EZ5 Base Plate Kit # RM-521448-5 will fit on your 2017 Jeep Wrangler Unlimited. The primary difference between the two designs is the way they attach to the tow bar. The EZ5 does not use the quick-connect crossbar which provides a cleaner look, but prevents you from using some accessories that mount to the crossbar such as a Rock Guard like the Roadmaster # RM-4000. If you are at all interested in using a rock guard or protective...
    view full answer...

  • Flat Tow Wiring for a 2017 Jeep Wrangler
  • The Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit, part # RM-15267, is the best option for you to use to flat tow your 2017 Jeep Wrangler. It will provide a 6-Way wiring harness to the front of your Wrangler that you can connect to the 7-Way on your RV with the included Flexo-Coil cord. If your Wrangler has separate lighting you will need to use a wiring converter, part # 118158, along with 2 additional diodes, part # RM-792, to keep your turn and brake signals separate. If...
    view full answer...

  • Is a Battery Charger Needed with the Stay-in Play Duo Supplemental Braking System?
  • On your 2018 Jeep Wrangler, I am thrilled with the parts you ordered. The Mighty Cord Trailer Connector Adapter - 4-Way Flat to 6-Way Round - 12" Harness # A10-6034VP will give you the 12V charge line from your 7-way on your motorhome to give a maintenance charge to your Jeep battery. Although a charge line isn't required, the SMI Stay-IN-Play DUO Supplemental Braking System # SM99251 does use that vehicle battery, so I do recommend connecting it. You can simply connect the 12V wire...
    view full answer...

  • Parts Needed to Flat Tow a 2018 Chevy Colorado
  • There are a number of parts you're going to need in order to flat tow your 2018 Chevy Colorado, starting with compatible base plates. If you have Adaptive Cruise Control you will need the Blue Ox # BX1721 Base Plate Kit, and if you do NOT have Adaptive Cruise Control I recommend the Roadmaster EZ Base Plate Kit # RM-523182-5. For a tow bar I recommend going with the Roadmaster Falcon 2 Tow Bar # RM-520 because of how easy the tow bar is to connect to the base plates as well as its long...
    view full answer...

  • Parts Needed to Flat Tow a 2019 Jeep Wrangler Behind a Motorhome
  • For your 2019 Jeep Wrangler and Falcon 5250 tow bar you will just need to add base plates, safety cables, lighting, and supplemental braking as the other main components for flat towing. For base plates you can use # RM-521450-4. These are custom fit base plates for your 2019 Wrangler and fit models with the standard factory front bumper. These base plates are also compatible with Roadmaster Quick Disconnects and all Roadmaster tow bars. I have included a link to the installation instructions...
    view full answer...

  • Parts Needed to Flat Tow a 213 Fiat 500 Behind an RV
  • Demco base plates # DM9518300 fit the 2013 Fiat 500 Gucci and Lounge models. If you have a Pop or Sport model you would instead use # DM9518298. All of the compatible tow bars come with safety cables so you can use them or the ones you have; either way will be fine as long as you are using something. The most cost effective is the coupler style Kwik Tow # DM9511011. But if you are going to be doing a lot of towing I strongly recommend going with a non-binding tow bar such as the...
    view full answer...

  • Parts Needed to Flat Tow a 2017 Jeep Cherokee Trail Hawk
  • For a Blue Ox base plate kit that is confirmed as a fit for your 2017 Jeep Cherokee Trailhawk edition you would want the part # BX1136 which is a confirmed fit. Then for a tow bar the part # BX7365 would work well with this base plate kit. The Kargard you would want then is the part # BX8870. For lighting I would go with the custom fit kit part # HM56208 as it wouldn't require any splicing or drilling into the light housings. You will also need the brake lite relay # RM-88400. For...
    view full answer...

  • All Parts Needed to Flat Tow 2019 Jeep Wrangler JL Unlimited With Factory Bumper
  • There are a number of parts you're going to need in order to flat tow your 2019 Jeep Wrangler JL Unlimited and I'll list the parts you need below: - Base Plate Kit: Roadmaster EZ5 Base Plate Kit # RM-521450-5 - Tow Bar: Roadmaster Falcon All Terrain, Non-Binding Tow Bar # RM-522 - Safety Chains: RoadMaster 68" Single Hook, Coiled Safety Cables # RM-643 - Wiring Kit: Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 - Supplemental Braking System: SMI Stay-IN-Play...
    view full answer...

  • Parts Needed to Flat Tow 2019 Jeep Cherokee Limited, Latitude or Latitude Plus
  • For your 2019 Jeep Cherokee you'll need to first start with a base plate kit. For that you'd want the part # RM-521452-4. This fits the Latitude, Latitude Plus and Limited models. If you have an Overland, Trailhawk, or Trailhawk Elite you'd want the # RM-521451-5. Next you'll need a tow bar which for that the Roadmaster Sterling part # RM-576 is your best option for if you have the Latitude or Limited models since you'll need the included crossbar. If you have an Overland or Trailhawk...
    view full answer...

  • Parts Needed to Flat Tow a 2018 Jeep JL Wrangler Unlimited with Steel Bumper Package Behind an RV
  • Demco base plates # DM9519339 are currently the only base plates confirmed to fit the 2018 Jeep JL Wrangler Unlimited with Steel Bumper Package as of 6/28/2018. Demco has several excellent tow bar options that you can use: Commander # DM9511010 is rated for 6,000 pounds and is a non-binding tow bar which makes hookup and disconnect easy even on uneven terrain. Excali-Bar II # DM9511009 is rated for 10,500 pounds and is also a non-binding tow bar. Dominator # DM9511008 is rated...
    view full answer...

  • Roadmaster Invisbrake #8700 or Blue Ox Patriot II Supplemental Braking Comparison
  • The Invisi Brake # RM-8700 and the Blue Ox Patriot II part # BRK2019 are both supplemental brake systems but they are pretty far apart in every other way. The # BRK2016 is a much simpler to install setup that works very well. But you have to install and remove it every time you want to flat tow/drive. For this style though it is the best setup. The Invisibrake requires a one-time in-depth install that will take some time, but once installed it works great. If this is more like what you'd...
    view full answer...

  • Best Parts to Flat Tow a Jeep Wrangler TJ with D-Ring Adapters
  • Towing your Jeep Wrangler TJ behind your motorhome requires a tow bar, a kit to connect the tow bar to the Jeep, a lighting solution, and a braking system. You also may need a way to maintain the Jeep's battery while towing and a high-low adapter to keep the towing setup level. One of the best tow bars on the market is the Roadmaster Nighthawk All Terrain, part # RM-676. It's a non-binding tow bar that makes it easier to connect on unlevel ground. The arms are also self-aligning to...
    view full answer...

  • Difference Between Roadmaster EZ4 and EZ5 Base Plate Kits for 2019 Jeep Wrangler Unlimited
  • The main difference between the EZ4, part # RM-521450-4, and EZ5, part # RM-521450-5, base plate kits is how they connect to the tow bar. The EZ4 kit uses Roadmaster's Quick Disconnects that are included with a lot of their tow bars. The EZ5 kit doesn't use the Quick Disconnects but uses pins and clips and clips instead. The tow bar's crossbar is used with the Quick Disconnects of the EZ4 but with the EZ5 the lugs of the tow bar fit directly into the base plate brackets. Take a look...
    view full answer...

  • Supplemental Braking System Recommendation to Flat Tow a 2012 Fiat 500 Behind an RV
  • In the world of supplemental braking systems the discontinued AutoStop BX8893 is one of the more difficult installations. While it seems like a simple set up the reality is that routing the cable to the brake pedal can be complicated. Also if the breakaway system is used BRK3050 and gets tripped the system has to be sent back to the manufacturer to reset it. In short I would advise against this system and go with a less complicated braking system. One of the preferred systems for our...
    view full answer...

  • Flat Towing 2018 Jeep Wrangler JLU Rubicon With Bumper That Has Roadmaster Tow Bar Bracket Kit
  • The Roadmaster Nighthawk Tow Bar # RM-676 is a great choice for your new 2018 Jeep Wrangler JLU Rubicon; it will attach to the Roadmaster Tow Bar Bracket Kit on your Rock Hard Aluminum 4x4 Front Bumper and has integrated LED lights as well as a plug and safety cables so it offers the most convenience among the tow bar options. For a wiring kit to operate your Jeep's lights, I recommend the Roadmaster Diode 7-Wire to 4-Wire Flexo-Coil Wiring Kit # RM-15247 or to add a 6-way plug, the...
    view full answer...

  • Parts Needed to Flat Tow a 2018 Jeep Cherokee Trailhawk
  • Can you be more specific on if you are referring to the price of the parts or an installation? If it is the parts, there are a number needed and I'll be happy to let you know what they are if you need recommendations.
    view full answer...

  • Demco Base Plate Kit Recommendation for 2018 Jeep Wrangler JL with Steel Bumper Kit and Winch
  • The Steel Bumper Group/Package of the 2018 Jeep Wrangler JL Rubicon has the removable end caps to convert to a stubby along with being winch ready. The Demco Tabless Base Plate Kit # DM9519339 is compatible with this and would work well. Demco has several excellent tow bar options that you can use: Commander # DM9511010 is rated for 6,000 pounds and is a non-binding tow bar which makes hookup and disconnect easy even on uneven terrain. Excali-Bar II # DM9511009 is rated for 10,500...
    view full answer...

  • Replacement LED Monitor Light for SMI Stay-IN-Play DUO Supplemental Braking System SM99251
  • The SMI Stay-IN-Play DUO Supplemental Braking System # SM99251 includes an LED monitor light for the motorhome to provide visual confirmation of braking in the toad. This is shown by the arrow in the linked photo of the complete SMI kit. This individual item is offered as a replacement part # SM99612. For extra wire use # 12-1-1. This light does not electrically integrate into the actual motorhome display but it could be physically placed there if space allows. Please refer to...
    view full answer...

  • Flat Towing Setup for a 2016 Jeep Wrangler with a Lift
  • If the aftermarket bumper on your 2016 Jeep Wrangler has the 1 inch D-Ring bumper mounts, which it looks like it does, then you can use the Adapter for Jeep D-Ring Bumper Mounts # RM-035-1 which is compatible with the Roadmaster tow bar like the Sterling # RM-576. You can determine if these adapters are compatible by measuring the thickness of the D-Ring mounts. If they are 1 inch thick then these will work great! A complete flat towing setup includes a Tow Bar, Base Plate Kit, Safety...
    view full answer...

  • List of Parts Needed to Flat Tow a 2017 Jeep Wrangler Unlimited Behind an RV
  • There are several items needed to flat tow your 2017 Jeep Wrangler Unlimited behind an RV: base plates, a tow bar, safety cables, lighting, and supplemental braking. For base plates you can use the Roadmaster base plates # RM-521448-4. Please note the base plates do not fit Hard Rock or 75th Anniversary models. I have linked a video showing an example installation for you. For a compatible tow bar you can use the popular Falcon 2, # RM-520. I have linked a video review of this tow...
    view full answer...

  • Is MOPAR Part # 68321424AB Required to Flat Tow a 2018 Jeep Cherokee
  • From our experience the part 68321424AB is required on a 2018 Jeep Cherokee. I recommend checking with a dealership for confirmation. Unfortunately, that part must be sourced at a dealership as well. We do however, have everything else you may need to flat tow the Jeep. The custom base plate kit you need is either part # RM-521447-5, if your Jeep is not a Trailhawk or part # RM-521446-5 if it is. These will connect directly to the Falcon 2 tow bar, part # RM-520. Then you can...
    view full answer...

  • Parts Required to Flat Tow 2019 Jeep Cherokee Trailhawk Elite
  • There are a number of parts needed in order to flat tow your 2019 Jeep Cherokee Trailhawk Elite, which I will list for you: - Base Plate Kit: Demco Classic Base Plate Kit # DM9519340 (so long as your transfer case has a "Neutral" option) - Tow Bar: Demco Commander Non-Binding Tow Bar # DM9511010 - Wiring Kit: Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 - Supplemental Braking System: SMI Stay-IN-Play DUO Supplemental Braking System # SM99251 OR if your motorhome...
    view full answer...

  • Parts Needed to Flat Tow 2018 Ram 2500 Behind RV
  • In order to flat tow your 2018 Ram 2500 behind an RV you will need a base plate kit, tow bar, safety cables, a lighting solution, a supplemental braking system, and most likely a high-low adapter. I also recommend checking your truck's owner's manual for any restrictions or guidelines with it comes to flat towing the Ram. Starting with the base plate kit, I recommend the Roadmaster MS Base Plate Kit # RM-296-2. This kit is confirmed to fit your Ram 2500 and is specifically built for...
    view full answer...

  • Installation Details for SMI Air Force One to Stay-in-Play DUO Conversion Kit
  • I spoke with my contact at SMI regarding the Air Force One to Stay-in-Play DUO Conversion Kit # SM99231 referenced in your question. He stated that they do not have a specific installation guide for the conversion kit but that you will simply follow the guide for the standard SMI Stay-IN-Play DUO Braking System # SM99251 during installation. I have attached the Stay-IN-Play DUO installation details so that you can look through them.
    view full answer...

  • Replacement Actuating Cylinder for SMI Supplemental Braking Systems
  • I believe you are referring to the actuating cylinder and there are replacements available, depending on which SMI system you have. For the SMI Air Force One Supplemental Braking System for Motor Homes with Air Brakes # SM99243 you need the Replacement Duo Actuating Cylinder for SMI Air Force One Supplemental Braking System # DM6210. If you have the SMI Stay-IN-Play DUO Supplemental Braking System # SM99251 you need the Replacement Duo Actuating Cylinder for SMI Stay-IN-Play Supplemental...
    view full answer...


Do you have a question about this Tow Bar Braking System?




  • Why etrailer.com?

    At etrailer.com we guarantee:

  • Highest quality tow bar braking systems for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate tow bar braking system information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Test Fit:
Joe V
Video Edited:
Zack K
Video by:
Andrew K
Edited by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Video Edited:
Joshua S
Test Fit:
Nicholas E
Video Edited:
Jacob T
Video by:
Andrew L
Expert Research:
Adam R
Video Edited:
Kathleen M
Updated by:
Laura H
Video Edited:
Dustin K
Expert Research:
Jeffrey L
Video by:
Alan C
Video Edited:
Sue W
Photos by:
Sam P
Written by:
Lisa S
Test Fit:
Randy B
Video Edited:
Chris R
Updated by:
Sarah W
Test Fit:
Jared G
Test Fit:
Matthew S
Video Edited:
Zach D
Test Fit:
Andrew S
Test Fit:
Brent H
Photos by:
Jeffrey L
Test Fit:
Shane H
Video by:
Jonathan Y
Test Fit:
Robert C
Updated by:
Kristina F
Video by:
Michael B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!

Call 800-298-8924