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Most brake controllers stick out and get in the way, but this one hides the main unit behind the dash so your cab stays clean and uncluttered. All you see is a slim knob just 9/16" wide and 1-7/8" long that looks like it came straight from the factory. That single knob handles it all—adjusting brake power, manual override, and system alerts—without taking up knee room or interfering with your dash layout.
The Tow-Pro Liberty senses how hard you’re braking and sends the same force to the trailer brakes for an even, natural stop. Its internal 3-axis accelerometer keeps braking steady on flat highways or steep grades. It works with electric or electric-over-hydraulic brakes on trailers with up to 2 axles (4 brake assemblies), delivering smooth proportional braking that prevents that push-pull feeling and keeps everything in line.
You don’t need to splice wires or guess connections. The included vehicle-specific harness plugs directly into your factory port for a true plug-and-play install. With a 3' cable linking the control box to the knob, the main unit can mount almost anywhere behind trim panels using screws, tape, or zip ties (not included). Once installed, calibration happens automatically as you drive and brake normally.
The color on the knob tells you exactly what’s happening. When you brake, it fades from blue to red as braking power increases. During setup, flashing blue and green lights show calibration progress, turning solid blue when it’s ready to use. The LED colors make it simple to confirm operation at a glance without any extra screens or menus.
Engineered for safety and longevity, this controller meets UNECE R21 and FMVSS 201 standards. It handles up to 18 amps continuous output within a 9V–16V range and runs on 12V DC systems. With its compact build (main unit just 4" long × 3-3/8" wide × 1-1/8" tall) and solid-state electronics, it’s made for dependable performance tow after tow.
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Working well through one season. Hoping for many more.
Easy to install in my vehicle. Thanks eTrailer.
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
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 quick delivery. I had difficulty locating the factory wiring plug on my 2025 Ford Explorer but your customer support staff was able to help me locate and identify the correct plug under the dash. Installation was easy and straight forward.
Easy to order and the on-line chat assistance at time of ordering the product was excellent. Product arrived in a timely fashion and was well packaged arriving in good condition. Overall a good experience. Thanks etrailer!!
Nice little trailer brake. I like the fact it was easy to install and doesn't take up any leg room in the cabin of the truck.
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.
Installation went well, hardest part is removing vehicle panels to access wiring and mouting location without breaking them. Controller is installed and working as expected.
Installed this on our 2000 Class A for a tow dolly. Fabricated a mounting plate and screwed it all together. Actually took it on a trip to Montana and after the "learning" was complete it seemed to work just fine. Install was easy with the adapter harness for the Ford F53.
Best brake controller I have ever used. LOVE IT! Easy to set up, (nothing to do but wait for it to do it's thing). Then adjust braking power needed. I didn't think it could possibly be any good, because it was so simple. I was pleasantly surprised. I used the Tekonsha Prodigy P2 before and liked it, but thought I would try this REDARC. I highly recommend, especially the contoller is out of sight except for the button control.
Plug and play, works fantastically and blends into the dash area seamlessly. Once it's set, it works perfectly and has been fantastic. The hardest part was finding a place to mount it, but once it's put in, you forget it's even there. It's been in use for almost 2 years and continues to work like day one.
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.
The install was very easy and the fact that it didn't have to be level made it much easier to install hidden up and out of the way, the Redarc worked awesome for just about a year with my new dump trailer, very easy to adjust for different load weights. unfortunately just recently I was using the same trailer and I noticed the trailer brakes were not working, a quick check and I could not find a reason why, so unfortunately I have to spend more time to figure the problem out. This is the only reason for the 4 star review verses 5, I really liked the Redarc and suggested it to other friends, So I just have to find out what happened,
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
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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