Autowbrake - Plug and Tow Trailer Mounted Electric Brake Controller Review (2026)

How a trailer-mounted controller works

Unlike a conventional brake controller that mounts under the dash of the tow vehicle and wires into its brake system, the Autowbrake is a self-contained unit that mounts directly on the trailer itself. It uses proportional braking, meaning it adjusts trailer brake power to match how hard the tow vehicle is braking in a given moment rather than applying a fixed preset level every time, which is generally smoother and more responsive than older time-delay style controllers. Because the whole system lives on the trailer, it does not need to tap into the tow vehicle's brake wiring or onboard electronics at all, which is the core difference from nearly every other controller in this guide.

Installation and daily control

The manufacturer states installation involves mounting the unit with four self-tapping screws and connecting five color-coded wires into the trailer's own electrical system, a job most owners comfortable with basic trailer wiring can complete without professional help. Day-to-day control happens through a key fob remote rather than a dash-mounted control head, which lets the driver adjust settings from inside the cab without any wiring running into the tow vehicle. Three weight presets are built in, covering trailers up to 12,000 lb and up to three axles, so the controller can be tuned to a trailer's approximate loaded weight rather than requiring a fully custom calibration.

Why owners choose a trailer-mounted design

The main reason to pick this style of controller over a cab-mounted one is flexibility across tow vehicles: since nothing is wired into the truck, the same trailer can be towed behind different vehicles without installing or moving a controller each time, which matters for anyone who borrows trucks, rents one occasionally, or owns more than one tow vehicle. It also avoids any need for a smartphone app or Bluetooth pairing, running instead on a dedicated key fob and requiring a solid ground connection for consistent performance in all weather. Autowbrake backs the controller with a 3-year warranty and the remote with a 1-year warranty.

The trade-off against dash-mounted controllers

The clearest downside next to top-ranked rivals in the best RV brake controllers guide, like the REDARC Tow-Pro Liberty and the Timilge digital controller, is that those units let the driver fine-tune gain in real time from a dash-mounted display while driving, reading live feedback as road and load conditions change. The Autowbrake's key fob approach trades that live, granular adjustment for the convenience of never wiring a controller into the tow vehicle at all, which is a reasonable trade for owners who tow with multiple trucks but less appealing for someone with one dedicated tow vehicle who wants maximum in-cab control.

Who should buy this and who should not

This controller fits a trailer owner who regularly switches which vehicle does the towing, wants to avoid wiring into a truck's brake system entirely, and is comfortable using preset weight classes rather than continuously fine-tuned gain. Its self-contained design and remote control genuinely solve a problem dash-mounted controllers cannot, and the mounting hardware and wiring are simple enough for most owners to install themselves in an afternoon without professional help. Owners with a single, dedicated tow vehicle who want real-time gain adjustment from behind the wheel, or who prefer a controller with a full digital display, should look at the higher-ranked REDARC or Timilge units in the same guide instead.

Frequently asked questions