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THIS ITEM IS NOT A FIT FOR
2018 Kia Optima
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Blue Ox

Blue Ox Patriot Portable Flat Tow Brake System - Proportional

Part Number: BLU37TR
In Stock
$1,611.77
Retail:$1,829.00
You Save: $217.23
Flat Tow Brake System
Not Confirmed to Fit

2018 Kia Optima

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etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Small, light, and precise, this portable unit gets you smooth braking with basically no installation. Plugs directly into 12V outlet. Easy to swap between multiple cars. Control and monitor the system remotely from your motorhome with LCD display. 1-800-940-8924 to order Blue Ox flat tow brake system part number BLU37TR or order online at etrailer.com. Free expert support on all Blue Ox products. Great prices and Fastest Shipping for Blue Ox Patriot Portable Flat Tow Brake System - Proportional. Flat Tow Brake System reviews from real customers.
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Blue Ox Flat Tow Brake System - BLU37TR

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • Smooth Braking Experience: Mirrors your RV’s braking pressure for safer, more predictable stops
  • Ready to Tow Fast: Plugs into a 12V outlet—no splicing or wiring needed for setup
  • Made to Switch Cars: Lightweight 6-lb unit moves easily between vehicles with a second kit
  • Monitor From Your RV: LCD screen lets you adjust force, see alerts, and manually brake remotely
  • Includes Emergency Breakaway System: Stops your toad automatically even if battery power is lost
Made in USA

Features to know about

Smooth Stops Every Time: True Proportional Braking

The Blue Ox Patriot applies your towed vehicle’s brakes with the same intensity and timing as your motorhome, so you get smooth, predictable stops instead of jerky ones. Its built-in inertia sensor measures your RV’s actual braking and instantly matches that pressure at the pedal. You can fine-tune both force and sensitivity on the remote LCD display until the response feels just right. Once dialed in, the Patriot delivers steady performance on every trip—no need to reprogram it.

Portable and Simple: No Hardwiring or Permanent Mods

This lightweight 6-lb unit sets on the floor, clamps around the brake pedal, braces against the driver’s seat, and plugs into a 12-volt outlet—no splicing, no cutting, no permanent install. Adjustable feet let it sit level even on uneven floorboards, and the seat pad moves up or down to fit securely. When you’re done towing, lift it out by the handle and stash it away. It’s small and compact enough to move between vehicles with ease using an extra vehicle kit.

Blue Ox Patriot portable braking system positioned on vehicle floorboard before installation showing correct placement under driver seat area

Close-up of Blue Ox Patriot brake pedal clamp being attached to a car’s brake pedal showing proper alignment and connection method

Blue Ox Patriot braking system plugged into 12-volt outlet showing blue and green indicator lights during calibration

Stay in Control from the Driver’s Seat: Wireless LCD Monitoring

You can see exactly what’s happening in your towed vehicle with the wireless LCD display in your motorhome. It plugs into a 12-volt outlet, mounting on your dash with the included stand or hook-and-loop strip. The display shows braking activity in real time, lets you adjust settings, and includes a manual override to apply the brakes yourself if needed. You’ll also get alerts if the system loses communication, applies too much pressure, or if the towed vehicle disconnects.

Blue Ox Patriot in-cab monitor mounted in RV showing LCD display and control buttons for adjusting braking force

Blue Ox Patriot braking system monitor placed on RV dashboard displaying system status and override controls

Built-In Safety for the Unexpected: Reliable Breakaway Braking

If the towed vehicle ever separates from the motorhome, the included breakaway switch immediately triggers the brakes to bring it to a stop. A reserve air supply in the Patriot lets it activate even if the car’s battery is dead, and it can keep braking for up to 30 minutes after power loss. That kind of backup means you’re protected even in a worst-case scenario.

Ready for Modern Brakes and Long Trips: Hybrid-Mode Compatibility

With support for hybrids and continuous-power-assist brakes, the Patriot handles today’s advanced braking systems with ease. Switching to Hybrid Mode is simple using the remote’s Force adjustment screen. Whether you’re towing across town or across the country, the Patriot’s dependable proportional control keeps every stop steady and safe.

Specs

Compatibility

  • Compatible with: Hybrids and other cars with continuous-power-assist brakes

Dimensions

  • Overall dimensions: 8" long x 7-1/2" wide x 11-1/2" tall

Weight

  • Weight: 6 lbs

Warranty

  • Warranty: 2-Year warranty

What You Need to Flat Tow

Flat towing can be a much more convenient way to take your car RVing with you than using a trailer or a tow dolly. It'll save you storage space both at home and at the campsite, and it takes less time and hassle to hook up.


To flat tow your vehicle, there are 5 basic components you're going to need: a tow bar, a base plate kit, a safety cable set, tow bar wiring, and a flat tow braking system.


For the RV Between the RV and Towed Car For the Towed Car
Hitch Tow bar Base plate
Wiring plug Safety cables Braking system
Wiring adapter cord Wiring kit/diodes

The custom-fit base plate installs on the frame of your toad so you can connect the car to your RV with a tow bar. Hook up safety cables between the vehicles to ensure that the toad does not separate from the motorhome if the tow bar becomes detached. Tow bar wiring syncs your vehicle's signal lights with your motorhome's tail lights, as required by law in most states. Finally, the flat tow braking system - also required in most states - activates the brakes in the toad when you hit the brakes in the RV, making for smoother, safer braking, and preventing wear on your motorhome.

BRK2022 Blue Ox Patriot Radio Frequency Supplemental Braking System - Proportional - Portable Braking System

Replaces BRK2019

Installation Details BLU37TR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.6

547 reviews
Review sort icon
Small, light, and precise, this portable unit gets you smooth braking with basically no installation. Plugs directly into 12V outlet. Easy to swap between multiple cars. Control and monitor the system remotely from your motorhome with LCD display.

by:

It works great when you can get it to setup. I am using it in 2021 Jeep and it struggles to setup. I don't know if the front of the Jeep seats are too soft or if there is too much flex in the system arm that presses against the seat. On a trip a month ago, it started giving errors when descending a large hill. 2 weeks ago I struggled to get it working before a trip and on the return trip I gave up trying to set it. I just drove home with no brakes on the toad. My plan for the next trip (week after next) is to create a box for it to sit in that offers more support for the unit and hopefully allows it to work as designed. If not, I will be looking for something different.



by:

The setup was so much simpler than I thought it was going to be. My Samurai requires that I stop every two hours to run the engine a few minutes. Even when I needed to detach it temporarily to do so it was simple to set back up again.



by:

Used it on multiple trips behind my class c pulling a jeep. Do need to recharge the jeep battery each night after a day long pull. Over 10,000 miles lost signal 2 or 3 times. Im very happy with this product



by:

We've used this system on our Jeep Cherokee with a Blue Ox base plate and tow bar for nearly 10K miles, and we're very happy with it. We did have a remote display/control failure at ~6 months, but it was quickly replaced under Blue Ox's generous warranty. etrailer's prices were competitive, if not the best, and their install videos and phone/email support are unmatched. We've no complaints and highly recommend this device as a portable brake solution for towed vehicles.



by:

Very easy install and set up. Very light weight. Etrailer always provides excellent customer service and useful videos. I'm ready to tow the Jeep behind the Motorhome.



by:

Last trip we did we had issues with it connecting with RF remote. We got a bigger rig, and my tow vehicle is further away from the drivers cab. Is range an issue?

Victoria H. profile picture

Victoria H.

1/28/2025

Hi Wesley, I reached out to Blue Ox to get to the bottom of this for you. Our contact there said that range shouldn’t be an issue as the RF controller has 350ft range in open air. Have you tried moving the RF controller closer to the driver side window to see if that would help the connection? Please let me know if this resolves the issue for you.

Wesley profile picture

Wesley

1/26/2026

Doesnt work well with Ford Edge ST. In order to tow the car I have to disconnect the car battery, and supply a different power source. Any suggestions?



by:

I was super impressed with the online support in helping me pick all the items that I needed to purchase for flat-tow my Jeep behind my Ram. The box was busted open upon delivery of the Roadmaster Falcon hitch - but I think I got all/most of the parts.

You shipped out everything super fast, and they the many items arrived swiftly. Thank you for being there!



by:

Works great all electric no air compressor quick recovery



by:

Relatively easy to install the break-away. Also had to install constant 12v outlet. Have not towed with it yet. But, seems to work as designed and am looking forward to using it.



by:

Easy install and instructions and thanks to KTM in Wantage NJ for a great installation!



by:

Nice system. Easy install,Calibrated easily, but I have not "toad" with it yet. I did run a dedicated power outlet for it.

Brooke M. profile picture
Etrailer Expert

Brooke M.

3/27/2025

I'm glad the experience has been smooth thus far! WE'd love to know what your feedback is once you get a chance to use it, too. Thanks, John!

John P. profile picture

John P.

3/28/2026

We used the brake with our F150 and it performed well in the Tennessee Smokeys. On a second trip had problems with system erroring out, did research and called Blu Ox, they gave me number to call. Customer support was excellent, listened to my issue and had me return the brake system for repair. They found a fault, repaired, calibrated and updated the firmware. Brake was returned to me in about a week, I put it in truck and it worked perfectly. Leaving on a long trip this week. Great product.



by:

Arrived on time and in perfect condition. As expected from eTrailer online ordering!



by:

I am still setting up my Jeep Wrangler JLU for flat towing and have not used the products yet but the quality seems good for all the items purchased.



by:

So far so good. Received my brake system yesterday and it installed perfectly and appears to be working as advertised. The brake itself was lighter than I expected, making it easier to store, then reinstall every time you're starting a new trip. I have not towed with it yet, so the complete story hasn't happened yet. Time will tell.



by:

This brake assist works perfect and is extremely easy to set up. I like being able to use it in any car I want to tow.

Christopher profile picture

Christopher

5/19/2026

After a year my Blue Ox Patriot is working just like new. Really happy with how easy is to set up. Glad I did not go with the competitor that chops into the brake system of the vehicle.



by:

Not as expected but will get me by. Maybe new brake pads will increase adjustment range but on max I can only say it may eventually stop. if it breaks away. I wouldn't want breaks locking, so it will do.



by:

After the first two or three times it’s fast and easy to set up. I adjusted mine to do little to no braking in normal driving, and its maximum brake application if a breakaway occurs. For me the purchase was about peace of mind regarding the unlikely event of a breakaway.



by:

Andy was a great help to get my flat tow started on my Ford Ranger. I will go to my local auto electric buddy for the lights installation. Thanks Andy for your help.

Victoria H. profile picture

Victoria H.

3/19/2025

That looks amazing Gary and I'm so happy to hear Andy was such so helpful to you! I will let him know you gave him a shout out. Enjoy the warm weather, we were just hit with another cold front in Missouri. I can almost feel the sunshine in this photo!



by:

Super easy to install on travel days. We just drove 3100 miles through several mountain ranges with no complaints. I did have the my E trailer representative install a plug between the connection upfront and the inside of the Jeep so it would not use the jeep’s battery all day. Worked excellent.



by:

What a great System! Works Great and this new model is smaller and lighter. stop messing around with your old model that has communation issues. The BRK2022 is excellent! Best price i found was right here at E-trailer. Thank You

Sal C. profile picture

Sal C.

5/10/2026

Excellent! This is a well built and easy to operate Brake System for towing vehicles.



by:

works great I like the remote monitoring system, so I know what's going on with the braking system at all times. The only reason I gave it 4 and not 5 stars is because even after trying all the different adapters on the brake pedal mounting, I still needed to tie wrap it to my pedal.



by:

At first glance- unit is very light, couldn't believe in it at first.
I went through the set up and made adjustments, then more adjustments.
It seems to work well to this point. Getting the seat in the right place took a little patience, setting the force / gain a little at a time until I could actually feel the jeeps brakes helping with slowing both vehicles. (force is at 5 now) Light braking does not seem to activate the unit but with a moderate to forceful application of the towing vehicle brakes I get a good response of the Blue Ox unit. the monitor that came with the system in the towing unit is a good indicator of the unit being applied. I haven't had an issue where an emergency application of brakes was needed but I believe the unit was helpful with the short exit ramps I encountered on the interstate hwy I recently traveled. One excursion that I just took isn't enough of a test but this first 1600 mile trip the unit was a good help.



by:

Perfect flat tow braking system for my Jeep Wrangler. I needed this on fairly short notice based on my install requirement schedule. I ordered this on late Friday afternoon and had it on my kitchen table Tuesday morn. Naomi was a great help, friendly, professional, and knowledgable. Thank you Naomi. The price was $300 less than any nearby dealer and they needed two weeks delivery. Once again Etrailer saved the day for me.



by:

My old brake controller died while we were on a long trip. I ordered the Blue ox and had it sent to our next campground. It arrived in time to install it and be on our way. Worked beautifully on the 600 mile trip home. etrailer never disappoints when I need something quick and has always had what I need.

Brooke M. profile picture
Etrailer Expert

Brooke M.

7/9/2025

Wow, I am so happy everything worked out well for you, Donald! Where did you travel to on that trip?



by:

Easy to install and setup. Unit came with all needed items. Ordering was simple. Getting ready to road trip the towing system in a couple days. Not expecting issues. Will be back to shop again. Great service and sales follow up.

Robert profile picture

Robert

6/24/2026

The Blue Ox Tow system is still working great.very happy with it. Easy to setup and use.

Kate F. profile picture
Etrailer Expert

Kate F.

6/24/2026

@Robert Glad to hear you are still happy a year later Robert! What has been your favorite trip with the new tow bars?

25
25

See what our Experts say about this Blue Ox Flat Tow Brake System

  • Parts Needed to Flat Tow 2024 Ford Maverick Hybrid
    Hi Scott; to flat tow your 2024 Ford Maverick you will need a base plate, tow bar, safety cables, wiring, and a supplemental braking system. In addition to the Demco Tabless Base Plate Kit # DM77YV and Stay-IN-Play Duo # SM99251 or # DM86VR (with wireless monitor) you already selected you will need the following: -Demco Commander II Non-Binding Tow Bar # DM9511012 (comes with safety cables) -Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267 -Roadmaster Battery Charge...
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  • Recommended Base Plate for a 2025 Ford Maverick Hybrid
    Yes, it does Gary! The Blue Ox Base Plate Kit item # BX2914 has been confirmed to fit the 2025 Ford Maverick hybrid. I have linked a installation video below along with the instructions so you can see how to get it set up. If you have any additional questions go ahead and reach out in the comment box below. Here are the rest of the parts you will need to flat tow your 2025 Ford Maverick Hybrid: Tow Bar and Safety Chains - Blue Ox Alpha 2 Non-Binding Tow Bar item # BX7380 Wiring Harness...
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  • Blue Ox or Roadmaster Parts to Flat Tow 2023 Ford Maverick
    I prefer the Blue Ox flat towing setups over the Roadmaster kits as I have found them to be just a little easier to use and they are very well made. I wouldn't worry to much about the bumper cuts and it doesn't affect the shudder system like you mentioned either. So for your 2023 Ford Maverick I would go with the base plate kit part # BLU86HR. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle....
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  • Replacement Power Cord for Blue Ox Patriot 3 Braking System Monitor
    We do offer a replacement power cord for the remote/monitor on the Blue Ox Patriot Portable Braking System part # BLU37TR, it's the USB Remote Power Cable for Blue Ox Patriot 2 and 3 Supplemental Braking Systems part # BLU99XR. Please note, this version plugs into a USB port for power.
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  • Parts Needed to Flat Tow 2018 Jeep JL Wrangler Unlimited
    For your 2018 Jeep JL Wrangler, I recommend the Roadmaster EZ5 Base Plate Kit #RM-521453-5. This base plate kit is confirmed to fit your Jeep with the factory bumper and will work perfectly with your existing Falcon 2 Tow Bar. When installing the base plates, you will likely need to trim some fascia to allow enough room for the receivers (see attached pictures). I have attached the complete installation instructions that you can also look through. In order to flat tow your Jeep JL Wrangler,...
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    Image 1 for Image 2 for Image 3 for
  • Parts Needed to Flat Tow 2025 Jeep Wrangler Sport
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  • What Supplemental Braking System Should be Used with Two Different Tow Vehicles with Diff Brakes
    Hey Larry, you are on the right track picking out the correct components to flat tow your 2022 Jeep Gladiator but since your motorhome has air brakes that vehicle will need to have the Air Force One part # SM99243 installed on it which will not work with your truck that has hydraulic brakes. So this is a frustrating situation so what I would recommend is a removable braking system like the Blue Ox Patriot part # BLU37TR. There isn't a permanent install option that will work on both tow...
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  • Blue Ox Patriot Supplemental Braking System Power Draw
    The Blue Ox Patriot # BLU37TR has a 2 amp max draw on your 12v power. It keeps the internal battery charged so you have function if the main battery fails. For your vehicle battery to fail, there must be another draw on your battery. My recommendation for you is to use a 7-way to 6-way connection like the Hopkins Nite-Glow Tow Bar Extension Cord w/ Socket - Coiled - 7-Way RV to 6-Way Round # HM47054 if you don't already have it, and then using the Roadmaster Battery Charge Line Kit...
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    The main difference between the Demco Tabless Base Plate Kit # DM77YV and the Roadmaster Direct-Connect Base Plate Kit # RM97RR is just going to be the brand really. They're both very similar in the way they install, with Roadmaster being a bit more challenging requiring some trimming on certain models, they both have a removable drawbar, and they both use a direct connect style attachment. If it were me I'd go Roadmaster just for the fact that they've been consistently a household...
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    Yes, you will be able to use your Blue Ox Tow Bar # BX7420 and Blue Ox Patriot Portable Braking System # BLU37TR on your 2023 Ford F-150. But you will need a 12 Volt Outlet Kit # RM-9332 to power the Patriot braking system as the factory 12 volt will not have power when being flat towed. You will need the Blue Ox Base Plate Kit # BLU33FR for your F-150 along with the necessary wiring components. A Charge Line Kit # RM-156-25 is needed as the battery will be drained by your F-150 and the...
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    Hi Arthur, I took a look at your list of parts to flat tow your 2026 Jeep Wrangler Rubicon and it looks like you have almost everything you need! For the Blue Ox Patriot Supplemental Braking System part # BLU37TR, it plugs directly into a 12V outlet to power it, so you'll need to install one in your vehicle. Jeeps don't come with a 12V outlet, so I recommend the Roadmaster 12V Outlet Kit part # RM-9332 which runs to the Jeep's battery to provide power to your braking system. Speaking...
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  • Can I Run the Blue Ox Patriot Braking System On It's Own 6 Volt or 12 Volt Battery?
    Hello Chris, You can run the Patriot off an auxiliary 12V battery, but it’s not something I’d recommend as a long-term solution. The unit is designed to pull from the Jeep battery, and the draw is actually pretty low. If your battery is going dead while towing, it’s usually other systems in the vehicle pulling power, not just the Patriot itself. With a separate battery, the biggest concern is reliability. If that battery runs down, you lose power to the braking system. You’d also need...
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  • Would Blue Ox Patriot Apply Vehicle Brake If Vehicle and RV are Stopped
    You are correct. If the Blue Ox Patriot part # BLU37TR is not moving the accelerometer would not sense braking and start applying the brakes.
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  • Parts Needed to Flat Tow 2013 Jeep Wrangler Unlimited with Aftermarket Bumper that Has D-rings
    Flat towing a vehicle such as a Jeep Wrangler behind a Class C motorhome such as the Dynamax Force 37BH HD will require a few items including the tow bar and braking system. The Blue Ox Patriot braking system # BLU37TR that you referenced is a very good selection. I linked overview articles on flat towing that cover each of the items needed. These are a good starting point. But first I suggest you check with the bumper maker to confirm it is rated for towing. Not all aftermarket bumpers...
    view full answer...
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  • Flat Tow Set Up For a 2026 Jeep Wrangler
    Hey, Skip! Happy to help get your new Jeep set up for flat towing. There is going to be a list of parts, so I'll go ahead and list them all below for ya. Blue Ox Base Plate: Part # BX1139 Blue Ox Avail Non-Binding Tow Bar: Part # BX7420 Demco Stay-IN-Play Duo Braking System: Part # DM86VR Roadmaster Stop Light Switch Kit: Part # RM-751490 Roadmaster Battery Charge Line Kit for Towed Vehicles: Part # RM-156-25 (to keep your battery charged while flat towing) Roadmaster 4-Diode Universal...
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  • Recommended Base Plate and Flat Towing Parts for a 2023 Ford F-150 Tremor
    For your 2023 Ford F-150 Tremor, I recommend the Roadmaster Direct-Connect Base Plate Kit item # RM38VR. This kit has removable arms that are not only the easiest to connect a tow bar to but are completely removable. This will give your truck as close to a factory look as possible when removed. Some other parts you will need to flat tow your F-150 are listed below along with any installation videos we may have. Feel free to email me back if you have any other questions or concerns. Tow...
    view full answer...


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Info for this part was:

Employee Lindsey S
Edited by:
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Employee Daniel M
Test Fit:
Daniel M
Employee Jacob H
Installed by:
Jacob H
Employee Andy C
Installed by:
Andy C
Employee Thomas T
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Thomas T
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Samuel H
Employee Scott A
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Scott A
Employee Daniel D
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Daniel D
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Islye U
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Amanda K

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