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Most brake controllers stick out and take up knee room, but this one tucks the main unit behind the dash. All you see is a small knob, just 9/16" wide and 1-7/8" long, that controls everything—brake power, manual override, and LED alerts. It looks like it came from the factory and keeps your interior clean. The main unit mounts out of sight with screws, tape, or zip ties, giving you flexibility to place it anywhere within the 3' cable reach.
You can forget about jerky starts and stops with this proportional setup. The built-in 3-axis accelerometer senses how hard you’re braking and applies your trailer brakes in sync. Whether you’re easing to a stoplight or braking hard on a downhill grade, the response feels natural and balanced. It works with electric and electric-over-hydraulic brakes on trailers up to 2 axles (4 brake assemblies). That smooth braking also helps extend the life of your tires and pads.
Installing a brake controller doesn’t have to be complicated. The included vehicle-specific harness plugs directly into your existing tow package wiring—no splicing needed. Just connect the harness between your vehicle and the controller, mount the compact control box, and you’re ready to calibrate. Calibration happens automatically as you drive, so setup takes minutes instead of hours.
When sway starts or a quick stop is needed, pressing the knob instantly applies the trailer brakes and brake lights independent of your vehicle’s brakes. That gives you direct control over your trailer’s momentum whenever you need it most. The LED indicator changes color—from blue to red—as braking power increases, making it easy to see exactly what’s happening at a glance.
The Tow-Pro Liberty is engineered to meet or exceed UNECE R21 and FMVSS 201 safety regulations. It runs on 9V–16V DC with an 18-amp continuous output rating and a maximum charging voltage of 12V DC. This compact controller is made for durability in demanding conditions while keeping operation simple, safe, and consistent every time you tow.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
The hardest part was getting the zip ties tightened around the module without completely removing the trim under the steering wheel. I chose near the shifter for my location so it’s easy to reach but still out of the way.
Working well through one season. Hoping for many more.
The controller and dash knob are solid and nicely crafted. Both are made to be easy to install. The dash knob works great and is simple and easy to use. The manual is well written, and has detailed and very useful information. Be sure to get the REDARC Tow-Pro Harness (TPH-025), too, which is needed to complete the hookup of the controller.
Mounting the brake controller up and out of the way under the dash of my 2023 Tacoma required some thought. I chose to fabricate a bracket from a piece of 3/4" aluminum angle (bolted to the underside of the dash) and anchored the brake controller to it with zip-ties.
I love the separate controller and knob. The knob fit into a factory blank and the end result is factor clear. We picked up of 7x16 cargo trailer yesterday and the controller worked perfectly.
With the vehicle specific harness the install was very straight forward.
Highly recommended
Very straight forward installation, performs flawlessly.
Just as described. In just a few minutes I had everything plugged in and mounted. Super easy process and now I can safely haul my camper.
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.....
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.
Great instructional video that shows you how to install it! Only additional thoughts would be to include the bracket and piece to attach the button to in the original kit (add a few extra dollars to the price). I did not order the extra pieces and wished I had but did not want to pay additional shipping after the fact. The other reason for the four was that the product took over a week to arrive when originally it was only going to be a few days.
I really love the fact that there isn't a box hanging from my dashboard with this controller. It was easy to install. The only extra pieces I needed was a small angled bracket and some zip ties. I used one of the existing blank knockouts and the knob appears to be a factory installed item. I took my trailer for a short ride and the brakes adjusted easily.
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.
First time I've added a brake control since the old manual hardwire days. The adapter plugged right into the Tacoma harness and all worked out of the box. It took about 50 miles of normal driving for the unit to calibrate and once I set the controller for the braking movement I wanted (4) it's essentially hands off. I can feel the proportional kick in if I have to brake harder than normal. Nice install on the dash, looks factory. All in all, very pleased. Nice job Redarc.
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.
Very easy installation if you follow etrailer’s youtube video! Very nice!
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!
This product works very well to support braking with our GeoPro travel trailer. Installation was straightforward. We appreciated the excellent customer service provided by etrailer!
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.
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
Bought for my 2016 Toyota Tacoma to tow a medium size pop-up trailer. The unit works great and is easy to install and use. The dial is hard to see cause I mounted it so low but it is a set and forget item anyways.
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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