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Most brake controllers stick out under the dash, but this one tucks the main unit out of sight behind the trim. All you see is a small knob on the console—just 9/16" wide and 1-7/8" long. It looks like it came from the factory. The knob handles everything: adjusting brake power, hitting manual override, and showing color-coded alerts that shift from blue to red as braking intensity increases. No bulky box, no bumped knees—just a clean, factory-style look that fits anywhere on your dash.
The Tow-Pro Liberty delivers smooth, confident braking for trailers with up to 2 axles (4 brake assemblies). Its internal 3-axis accelerometer senses how hard you’re braking and matches the trailer brakes to your input. Light braking means gentle stops; hard braking means full stopping power. It works with both electric and electric-over-hydraulic setups and outputs 9V–16V at up to 18 amps continuous. The result is balanced, proportional braking that eliminates the push-pull feel and cuts down on wear to both tow vehicle and trailer brakes.
Installing a brake controller doesn’t have to be a project. This one includes a custom plug-in harness that connects directly without cutting or splicing wires. Once you pick a mounting spot for the knob, secure the main box behind the dash using screws, tape, or zip ties. The only limit is the 3-foot cable between them. Calibration happens automatically after about twenty normal brake applications—no special tools or trailer needed—and from there it maintains itself without any extra setup.
When you need instant control—like during a sway event or while easing down a hill—the manual override is right on the knob. A quick press applies the trailer brakes independently of your tow vehicle for better stability and control. The LED indicator gives clear feedback: flashing lights during calibration, blue when ready, and deeper red shades under stronger braking. The system meets UNECE R21 and FMVSS 201 safety standards and runs reliably on 12V DC power, proving itself every time you hitch up and head out.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Clear easy instructions. Plug it in, mount it, learn how to set it and it’s good to go. Works exactly as advertised. 2018 Honda Pilot.
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.
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.....
Installation was easy. Works as it shou ld
Easy to install. I pulled the lower dash annex off and found the factory connector. I then drilled out the factory knockout to insert the control knob. It works great !
Great product easy to install, works great on a Ridgeline. I pull a New River Geopro. Make sure you also purchase the mounting plug that goes in the dash.
Etrailer is great. Service is outstanding even the return policy. My go to for trailer needs
The product is exactly as described. Plug and play. Easy to understand instructions. Will use this company as needed in the future.
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.
Used the Redarc Pro now for a year (Honda Ridgeline) and it has worked well. 4 clicks on the brake controller was the right spot for my 3500 lbs load.
Fast response, shipping was great got my item in 2 days, and it works amazing easy to install on my 2019 Honda Ridgeline, it helps alot while braking.
Easy to install and fantastic product! I recommend hiding the unit behind the kick panel.
Worked flawlessly. Plug and play. However a button spot would of been nice to have. Looks janky and now I am having trouble finding a replacement button to hold the new brake.
easy install .. 20 mins..hides under dash with zip ties. unfortunately we sold our camper right after the install and bought a motorhome so I never used it. most rental trailers have hydraulic breaks and my landscape trailer has none.. its there so one day I may need it.
etrailer is awesome. I bought the kit for a Honda Ridgline which came with a plug and play wiring harness. I took a sharp chisel to a unused button location on the Honda to mount the control knob. It was a bit fifddly to ge this just right, but worth it. I used a L bracket just like the installation video. Nice work etrailer.
Installation was easy…if you can access under the dash.
Little tight on our Honda Ridgeline.
Works great…exactly as needed and advertised.
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.
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.
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.
Very easy install. My model of Ridgeline came with a towing package and was pre wired for a trailer brake controller. The adapter cable that came with the controller plugged directly into the Honda pigtail. The instructions showed where to find the pigtail; and how to identify it. This controller measures the deceleration of the tow vehicle in order to match the trailer brake pressure to the truck. To get an accurate measurement it must be mounted to something solid, so don’t ziptie to a bunch of wires. I found space on the bracket for the parking brake and secured it the two machine screws.
This controller easy to calibrate and easy to adjust. The best part is it will turn itself on when you plug trailer brakes into the tow vehicle.
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.
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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