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Most brake controllers stick out and take up knee room, but this one tucks the main unit out of sight. All you see is a sleek knob on the dash that’s just 1-7/8" long and 9/16" wide. It looks like it came built into the console. That single knob handles everything—adjusting brake power, pressing manual override, and showing color-coded alerts from blue to red as braking intensity increases.
No more tugging or jerking when you brake. The internal 3-axis accelerometer senses how hard you’re stopping and matches your trailer brakes in real time. It works with electric or electric-over-hydraulic setups on trailers with up to 2 axles (4 brake assemblies). The result is steady, even braking that keeps both tow vehicle and trailer moving together.
Wiring a controller doesn’t have to be a project. This setup includes a custom plug-in harness that connects directly for a clean, plug-and-play install. The main box mounts securely behind trim using screws, tape, or zip ties within the 3' cable reach. Calibration happens automatically after about twenty brake applications—no special tools, no guesswork.
Safety standards matter when adding electronics inside the cabin. The Redarc Tow-Pro Liberty meets or exceeds UNECE R21 and FMVSS 201 regulations for interior impact safety. That means it’s designed to blend in without compromising airbag zones or occupant protection while giving you full braking control right at your fingertips.
Once installed, the small control knob looks like it belongs there—no bulky box under the dash or wires hanging down. You can mount it in an open switch panel or console spot for a tidy, OEM-style appearance that keeps your cab uncluttered while still putting all brake control functions within easy reach.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
i have ordered 2 of these in the last 2 years and both times the kit was missing parts, last one i ordered the knob was missing and this last order the nut to hold the dial in place was not in the box. the product is good, but replacement pieces are not easy to find, fortunetly i had to order a complete dial kit for the one i ordered last year and i saved the rest of the parts.....
Expedited shipping was super fast with no problems. I installed the unit myself and it was fairly simple. I recommend getting the exact fitting wire harness (huge time saver) and I’d recommend getting and exact fit knock out to install the dial in. (Another big time saver). I drilled a hole in my own blank or knock out thingy and I’m pleased with it but it took a little time. I’ve got a 2010 Honda Pilot. Funny thing, after rushing to install the brake controller, our trailer had to go in for repairs before we even completed the transaction. It will be another month before I actually use the brake controller.
Perfect for installing my RedArc TowPro Elite in my 2022 Ford Bronco. Plug and Play - Note: In order to be a Plug and Play install, Your vehicle must already be equipped from the factory with the Towing Package, which means that it is PRE WIRED for the Trailer Brake Controller and there will be a large rectangular plug for the TPH-007 harness to plug into. If your vehicle was NOT equipped with a factory tow package, this connector will NOT BE THERE and you will need to run wires to the TowPro unit using the basic wiring harness that is supplied with the TowPro and you will need to run a trailer brake output wire to the rear of the vehicle at the 7-pin connector port.
Easy installation, just waiting on trailer for for testing application.
etrailer recommended a installer and all worked well:)
Etrailer is great. Service is outstanding even the return policy. My go to for trailer needs
On the Promaster when you take the BCM cover and upper dash cubby hole piece out there is a spot right above the BCM. Since the Redarc can be mounted any direction I simply added two 4mm Rivnuts to the bracket and bolted the controller in with stainless hardware (Bolt, washer, lock washer). The rest of the dash is kind of hard to find a spot, as I wanted it reachable with my right hand as I drive with my left typically. The lower instrument panel knee bolster comes down with a few screws and the inner dash piece has a hole from the factory that is perfect for the switch wiring. I used a unibit drill and a small square file to make the hole for the switch. The 90 degree cat cable is nice as it sticks through the inner hole and holds itself in place so it doesn't fall out into the bakc of the dash during assembly of the switch and there is enough room in the rear to not impede anything factory. I used a tap from O'Reillys's to tap into the brake wire suggested by the Mopar trailer wiring install guide. Typically I'd solder it, but it looks way better than a typical scotchlock connector, which I would not use under any circumstances. Ill chck its tightness in a few months and see how it holds. Used the factory wiring harness runs to run to the battery box under the floor. Used proper friction tape and braided wiring loom (O'Reilly's find) for a factory look. Seems to work ok, but need a trailer with brakes now.
Exactly what was needed for my 2025 Ford ranger. Plugged right in still working on mounting brake control. Very quick shipping and keeping me informed. I believe this is the only place I'll go to for my trailer needs now.
etrailer's response from the time I ordered to delivery was fast, efficient and the kept me up to date. Installation instructions for the RedArc Tow-Pro Liberty were clear and easy to follow. System installed easily and works great towing my small travel trailer.
I purchase this brake controller because of the way it was advertised.
It lives up to to claims and easy to install.
Ordered the parts and additional wiring harness that I was told I needed per e-trailer. I specially asked two different e-trailer customer service reps, and was verified both times. It does not fit and is not compatible with my F-150.
This controller works amazingly well, considering the ease of installation, especially with the vehicle-specific wiring harness. I made several trips between Missouri and Colorado last year, loaded and unloaded, and a small twist of the dial compensated for the weight differences and braking requirements.
2023 Ford F150 Mine had power to the Brake port. Install took 30 minutes.
Worked as it should. I was the controller nob was larger . It is hard to see .
It works great for my two axle Trailer.
Easy installation, this is my second Redarc brake controller. The first one is a fantastic brake controller and I didn’t hesitate about installing another in another truck. The automatic calibration is the best experience I have had with numerous brake controllers.
Fits good
Looks nice with the small control knob
Red control box hidden behind glove box
Control knob on front of console beside factory windows switches
My ride is a 2022 Ford Bronco /manual transmission
I like the compactness of this controller. It can be a little tricky to get the switch/knob mounted correctly and I feel like they should work on that knob mounting system more and include the faceplate instead of charging $10 more for it…a tiny little piece of plastic. But the controller is easy to hide in the dash and since I bought the kit with the wiring adapter to go with my truck it was a breeze to install that. I placed my knob/button whatever you call it on the left side of my dash under the light switch so that I can see it around the steering wheel and able to adjust and use it with my left hand and drive with my right.
I didn't realize when I bought a new Frontier truck that I could no longer use traditional underdash brake controllers like I had for past 40 years. This meant that this Redarc was one of only a few brake controllers that I could use.
Mounting it was a bit tricky and the supplied instructions weren't good. Fortunately others before me had figured it out and posted better step by step instructions with pictures.
The brake controller itself works very well and provides the best and smoothest braking control I've ever experienced with my twin axle camper on multiple trips this last summer including one trip of over 1,000 miles around the UP of MI and northern WI.
Bought a 24 Ranger with towing package that did not have a factory brake controller. Ordered this one. Straight plug and play. It took longer to hide the wires than it did to install the unit. Probably 30 minutes start to finish. Tested it while pulling a camper, and it works like a charm.
The break controller works great...no problems. I've since sold the single axle trailer and purchased two more, one single axle new and one double axle used. I plan on stripping the cargo trailer and replacing the breaks and anything else that needs it for the suspension, creating a type of mini-home or tiny home on it. Thanks for reaching out. I will use your services for this new build. Thank you and keep up the good work!
Being new to towing a larger trailer requires research. After doing a lot of it, both through user reviews and manufacturer websites, we landed on the Rearc Liberty Brake Controller for our Tacoma. We have just over 1000 miles towing with this unit. It has performed extremely well. Towing for us includes city, highway, mountains, and even off-road to access our mountain home. Installation was straight forward and the ability to install the controller in virtually any position is an added bonus. I was able to install the dash knob in a blank panel giving the Tacoma a factory appearance, and controller located under drivers seat. I installed this unit on a non tow package Tacoma, so wiring was a bit intimidating at first. But using etrailer’s web site as a reference had everything operational in a couple afternoons. Great product so far and we look for years of use. Highly recommend.
I purchased the Redarc Liberty brake controller because I couldn’t find a place to mount my Tekonsha where I wouldn’t bash a knee or shin on it or cover an airbag.
So far, I’m very happy with the Redarc Liberty brake controller; although, I haven’t used it for towing yet, and I’m not sure it is operating properly. Apparently, I should have blue lights while it is learning which way the control unit is oriented but I don’t have blue lights.
Anyway, let me share information on the installation. I purchased the wiring harness for my vehicle, which I highly recommend as it was same cost as the universal harness, and a big time saver. I did not buy the blank switch panel for the switch installation as another reviewer stated he was able to modify the original switch blank. Big mistake, I highly recommend buying the appropriate switch panel for your vehicle. My Toyota blank switch panel was excessively complicated so I had to saw and melt a pile of plastic (see the picture) out of it without damaging the visible portion or the clips which hold it in.
Finding a suitable location to secure the controller up under the dash is a challenge with modern cars. After removing two pieces of plastic trim, I did manage to pull the panel below the steering column far enough out to complete the install. The unit it does look good. Very clean.
We’ll be towing the big trailer next week so I hope it works.
The Redarc Liberty was exactly what I wanted for my ‘20 Ridgeline. I ordered the custom pigtail and mounted everything behind the dash panel on the left side of the steering wheel. There was a blank switch cover available on the dash panel and I cut away the webbing on the back side of it (very soft plastic, Swiss Army knife) which allowed the control switch to fit right in, between the retaining clips of the blank. The drill bit sizes indicated in the instructions were not big enough for the control knob and plastic bezel so I just increased the bit sizes until the holes were big enough. Honda provided a pigtail with bare ends; I didn’t want to crimp any wires. Honda also said to put their provided fuse in slot 3 in the under hood aux fuse box; the fuse was the wrong type and there was already a 20a fuse in the appropriate slot. My Honda service tech advised Honda usually includes the wrong style of fuse and also usually installs the right one anyway. Go figure. I finished the install the night bf I picked up my new TT; took about 3 hours. It wasn't difficult but I’m pretty OCD. The most work involved routing the wires so as to avoid pinching or bending them too severely. I set the control on 5, tested it with the trailer hooked up in the sales lot and bumped it up to 6. I never felt the trailer on braking at all on the way home. Very smooth and I like the fact that it looks like a factory install. I couldn’t be happier with this controller. E-trailer’s video for the install was a great help, although I mounted the control box in a slightly different spot. This is my second purchase of towing accessories from E-trailer and I am pleased with the service and pricing both times.
My Redarc Tow Pro Trailer Brake Controller has worked stellarly. It has occasionally had to self-recalibrate, but has done so successfully. On my end, I've needed to keep the contacts clean and make sure they're securely connected. I used a conduct-ant greece that prevented corrosion from hindering contact and would recommend its use. Thanks so much for an excellent component!
Stuart
8/6/2026
My Redarc Tow Pro Trailer Brake Controller seems to switch on and off a lot. It always recalibrates and comes up working, but the frequency of the on and off again factor concerns me. Thanks for the inquiry!
Christopher H.
8/6/2026
Its simple and fits in the dash like it should be there. It controls the trailer as it should. it only lights up when the trailer is connected so you don't see any annoying light during normal driving. I would recommend, it has worked for me. installed in a 2016 Jeep Grand Cherokee
Installed it on my 2022 Subaru Outback Wilderness. Ordered this without the harness so had to order that separately. I think the RED52VR is what I should have ordered to include the harness. Did not like the access and the very small wire gauge on the brake pedal the instructions said to tap into so when running the wire from the 7 pin kit ETBC7 from the back of the car I ran a 3rd wire which I tapped into the brake signal going to the factory 4 pin control box in the spare tire well. I ran the wires up underside the driver side and up through the floor by the drive door rather than into the engine bay. Found a neat location to mount the controller and ground wire. Installed the control switch after drilling and dremelling the blank as shown in the great video etrailer has. Unit calibrated and worked just as advertised. Been on short test run. Need a longer trip to experiment with the brake level setting.
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Rob W.
8/25/2025
Still working great!