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Most brake controllers take up space under the dash, but this one hides neatly out of sight. The main unit measures just 3-3/8" long x 3" wide x 7/8" thick and mounts under the dash with an adhesive pad or zip ties. You control everything from your phone over Bluetooth, so there’s no bulky box or extra switches cluttering your interior.
Instead of knobs or buttons, you manage all your trailer brake settings through the OneControl app on your smartphone. Adjust max braking output, sensitivity level, and even use the big on-screen manual override button—all right at your fingertips. The app works without mobile data once downloaded and runs on Apple (5.0 and newer) or Android (4.3 and newer).
If you switch between different trailers, you’ll appreciate how simple it is to save and recall profiles in the app. Each trailer can have its own max output and sensitivity settings stored, so you don’t have to re-tune every time you hook up something different. Just swipe between saved profiles and go.
The built-in 3-axis accelerometer reads how your tow vehicle slows down and matches your trailer’s braking power to it. That means smooth, even stops whether you’re braking hard or easing to a stoplight. It’s compatible with electric trailer brakes on trailers with 1 to 4 axles (8 brake assemblies total).
Setup is quick thanks to the included custom harness that plugs right into the factory tow-package port under the dash. Once connected, pairing over Bluetooth takes about five seconds, and calibration finishes automatically when the LED turns green. Built-in reverse polarity and short circuit protection keep your system safe while towing.
Alternate Instructions
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Ratings & Reviews
The cable assembly made installation quick and easy, all I had to do was locate the Ford supplied connector in my F150. The cable assembly supplied by Curt plugs into the Ford provided connector. Plug the opposite end of the Curt supplied cable into the controller and the electrical installation is complete. Note: the Ford supplied connector has a protective cover on it, you have to remove this cover before this Curt connector will plug in.
This controller took me literally 15 minutes to install with the required pigtail and my Rubicon with factory towing package installed. When I initially downloaded the app and connected, it actuated and locked the brakes. I simple deleted the app and reinstalled and everything worked normal.
Installing and using the Curt trailer brake controller was simple and worked perfectly. I Can say the same about the customer service at etrailer. And will certainly be using them both
Made install easy. I ran my own 12 ga wire to 7 pin connector for trailer brakes. I couldnt find the fuse and or relay needed for my 2011 F150 to complete factory circuit. I NEEDED the trailer the next day with a 3,000 lb tractor on it. Worked well.
Researched, purchased and installed a hitch and brake controller for my 2009 F-150. It was so much easier using etrailer. I have recommended them to several friends for their towing needs.
This pigtail that Dan T. with e-trailer help me get order an shipped worked perfectly. It was a custom fit for 2016 F-150 w/ no tow pkg and a Curt 51120 brake controller. This will almost complete my conversion of my truck that had no tow pkg. In the end it will help my daughter tow her Shooting S barrel horse safely to the shows. Thank you Dan T.
Was not aware this device draws on the battery constantly. I don't daily drive my truck and have had to replace the battery twice in one month due to being drained below the point where they could be recharged. $[XX] later and this controller removed, I've not had any problems with the battery
The Curt wiring adapter for my 2009 Ford F-150 plugged into the controller and the truck connector under the dashboard exactly as it should have. It works great.
This brake controller has to be unplugged when not in use or it drains the battery in a few days. I had to have a electrical test done in my vehicle ($XXX). The etrailer tech said the test was done incorrectly. The Chevy dealer claims it was accurate. I’m left with a problem.
Needed a brake controller I could rely on because I was pulling my camper to a site at the top of a 25% grade within a few days. Unit plugged right into the harness for the factory brake controller (with the adapter cable) on my 2014 Ford F-150,and worked perfectly. Bluetooth connectivity works through the app (rather than through the phone's "settings" icon),and connects instantly. I'm very pleased with this product.
Etrailer provided outstanding information regarding the technical details of the product along with easy to understand installation instructions. The brake controller provided a cost effective solution for my basic requirements. The installation was a "snap", the only time consuming task was determining the optimal location/position install the brake controller. Item was installed in a 2013 Ford F150 and I use it on a dual axle trailer for hauling a compact Kubota tractor.
Excellent - no hesitation in making that evaluation
I bought a brake controller, interface cable for the F150, and the 7 pin plug that goes on the back bumper. All items are great quality. Parts arrived as expected with shipping as paid for. I am installing the equipment, but don't have any issues. There were no installation instructions, however these are available on line line detail. I do not expect any operational probems but am a few days from making that test.
As first time truck and pop-up trailer users, we initially purchased a cheaper brake controller that required drilling the dash. This is a new truck, so we decided to switch and spend more for the Bluetooth. etrailer was easy to work with for a return, and the Bluetooth brake controller is fantastic - so easy to use with our new trailer!
I really wanted a trailer brake controller that I didn’t have to stick an ugly knob/box hanging off my dash. This was my solution and it works perfectly. Plugged right into my Honda Ridgeline existing plug, and easily connected to the app on my phone. Nice setup.
Just as described. With truck specific wiring harness, installation was simple. Highly recommend!
I was looking for a trailer brake controller that did not require a permanent mounting to the dash or center console of my 2020 Jeep Grand Cherokee Trailhawk. I initially considered the wireless bluetooth controller from Curt Echo that plugs directly into the 7-pin outlet next to the tow hitch. However, reviews from individuals that tow RV trailers identified that particular option prevents the 12v battery on the trailer from charging off of the TV while connected. This would limit the RV utilization during long trips involving boondocking.
The Curt Echo under-dash controller seems to solve that problem and uses the same user interface as the Curt Echo.
Easy to install and operate; problem solved!
Easiest install ever !
Plug and play. App is easy understand and use.
My favorite is with the app and on selected active profile you can see the amount of brake amount is being applied to the trailer when the vehicle brakes are applied. I also install the manual override button. FYI: you don’t need the app on your phone open for the controller or the manual override button to work. Also another nice feature of the manual override button is the size about the size of a quarter, uses a CR2032 battery and the battery level is displayed in the app.
This was relatively easy to install under the dash of our 2021 Jeep Grand Cherokee, especially since ours has the factory Trailer Tow Package and therefore an existing pigtail connector ready to connect to the brake controller. The Curt wiring adapter made it super easy to connect the Brake Controller to the vehicle's wiring harness. The controller was easy to calibrate and worked seamlessly while we're towing a rented trailer. We used a dedicated (older) cell phone to operate it while we're towing to avoid any potential interference from other apps rather than using our regular phone on which we receive phone calls texts, etc. This was our first time towing a trailer and this easy-to-use Brake Controller helped make us feel safe and comfortable. Highly recommended.
I purchased the C51436 adapter to install the C51130 trailer brake controller in my 2010 Ford pickup. Everything worked as stated. Good products from a good company with quick service.
Larry M.
2/8/2018
I am very happy with all of my purchases from etrailer. The products are still working fine after a year and your company is very good to work with. Any future needs I have will be purchased at etrailer.
Do not buy either the Curt Under-Dash or plug-in Wireless brake controllers until Lippert fixes the phone app. I’ve used both happily with the old ECHO Smart Control app. I could use the remote manual button with the phone app not even running. As one would reasonably expect the button talked to the controller directly via Bluetooth. The new OneControl Auto app must be running and in the foreground to use the manual remote! And the most recent version of ECHO Smart Control is non-functional, it just tells you to install OneControl Auto.
Exactly what I paid for with fast shipping at a good price. Everything looks great and works perfectly.
Kenneth
2/12/2025
Still doing exactly what it is supposed to do. My only hint to you is, unless you have a photographic memory, do NOT throw away the quick reference card.
Jameson C.
2/12/2025
The break controller worked seamlessly. Profiles are easy to set up and it has very reliable Bluetooth connectivity with my phone. Installation was really easy on my Honda Pilot!
This is a perfect fit for our E450 RV chassis. It made the install a five minute job.
Kate M. my salesperson, had a most professional interaction with me being certain of my and my vehicle's needs. In addition, she walked me through the complete installation process. This I completed, wiring the 7-way and the Curt Discovery Controller making no errors along the way. On the first test, every terminal on the 7-way tested as it should. When we came home with the RV from the dealer, all the lights and the brakes worked flawlessly. Many thanks!!
Adapted Curt brake controller for my 2014 Ford F150 STX without any problems. Just find your Ford brake control connector behind the coin slot on the left side of the dash and plug it in.
Tommy J.
1/31/2015
After a year of using the Curt brake controller it has been by far the best one of several I have used and installed. i highly recommend the controller.
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John Y.
2/19/2018
perfectly satisfied