To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
Most brake controllers take up legroom, but this one hides everything except a single control knob. The compact knob sticks right to the dash with adhesive or a single screw, while the main unit mounts out of sight behind trim panels. At just 1-3/4" in diameter and 1-1/2" deep, it looks like a factory switch instead of an add-on. You get fingertip access to braking power, sensitivity, and manual override without cluttering the cab.

Every stop feels steady thanks to proportional braking that mirrors how you slow down. The internal 3-axis accelerometer senses your vehicle’s movement and applies the trailer brakes in sync, eliminating that push-pull surge when stopping. It works with electric trailer brakes on trailers with up to 4 axles (8 brake assemblies). The result is even, reliable braking that reduces wear on both tow vehicle and trailer brakes.
Installation doesn’t get much simpler—hardwire the included universal harness under the dash, plug it into the module, and mount the knob where it’s easiest to reach. There’s no drilling required, and the 4' cable between knob and controller gives you flexibility on placement. It’s fully compatible with ABS brakes, cruise control, low-voltage wiring, multiplex systems, and PWM signals, so integration is straightforward on modern vehicles.

No guessing what mode you’re in or whether your trailer brakes are active. The built-in LED display uses colors and patterns to show braking output, sensitivity level, and diagnostic alerts right on the knob face. Press the center button to adjust modes or hold it for manual override—everything you need is right there in one clean control point.

When you’re towing different trailers or dealing with hills and crosswinds, fine-tuning is quick. Turn the dial to raise or lower braking output based on trailer weight, then tweak sensitivity to change how fast power ramps up. That control lets you match brake feel exactly to road conditions so your stops stay smooth whether you’re lightly loaded or fully packed.

If you don't already have a 7-way plug at the back of your vehicle, take a look at our exclusive 7- and 4-way brake controller installation kit (ETBC7 - sold separately).

Ratings & Reviews

Richard. L.
3/8/2026
Everything seems to be working perfectly. Easy installation. Would definitely buy from e trailer again


Henri G.
10/16/2023
Après un an dusage, je trouve ce produit difficile à ajuster selon le poids chargé dans la remorque. Le processus est compliqué et je dois me référer au livre dinstruction. Pas pratique.


Evan
11/10/2020
Wonderful! It has been a great tool!

George
5/27/2020
I really haven’t used it much after install except to test with empty car trailer. It worked well. Three or four people I have showed it to have been impressed! Thanks

Doug
4/26/2021
I have thousands of miles on the trailer now. The brake controller has worked flawlessly. I have towed cars, ATVs and loads of lumber just set the controller for the load and it does the rest. Excellent product.

Richard
3/8/2026
Product works perfectly. Easy install.
Do you have a question about this Trailer Brake Controller?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.






Bob F.
1/13/2020
It has worked out great, I have over 4,000 miles of towing with it highly recommend it!!