Best Brake Controller: The Tekonsha P3, and What Your Truck Changes

A brake controller is the one towing part where the truck you own matters more than the brand you like. The same controller that clicks into one truck's factory plug through a short harness has to be spliced into the next, and a few trucks leave you no plug at all. So we pick by situation first and by controller second.

We've reviewed the Tekonsha Prodigy P3, and it's our pick. We earn nothing on it: there was no genuine new P3 on Amazon when we checked, so it links Tekonsha. The other three picks are unreviewed by us, chosen for the jobs the P3 does badly, and we say what each maker publishes and what we haven't checked.

Our pick: the Tekonsha Prodigy P3

The P3 is the wired controller we'd put in a truck that has a factory brake-controller plug and no factory controller. An inertia sensor reads how fast the truck slows and sends the trailer matching power, it handles electric or electric-over-hydraulic brakes on one to four axles, and it stores up to five setups, so the empty trailer and the loaded one each keep their own settings. Its manual control is a full-hand lever that applies up to the power you've set. Our review covers setup, boost and the errors owners hit in detail.

Two things count against it. It's a box on or under the dash, and in a tight footwell it meets your knee. And buying a genuine one takes care: at our check, the "90195" controllers on Amazon came from other brands, and the Tekonsha-brand listings were used bundles. Buy it through Tekonsha's own page or a Tekonsha dealer, keep the receipt, and the limited lifetime warranty covers you as the original purchaser. The vehicle-specific Tekonsha harness is sold separately.

Pick by how your truck is set up

• Factory plug, room for a box: the Tekonsha Prodigy P3. Smooth proportional braking, presets for more than one trailer, a lever you can grab by feel, and it moves to your next truck with a new harness.
• Factory plug, cramped footwell: the REDARC Tow-Pro Liberty. A proportional module hides behind the dash and only a small knob shows, which is why Tacoma and Tundra owners with tight cabs pick it. It handles one or two axles, carries a 2 year limited warranty, and needs a REDARC harness bought separately. Some owners want the big lever instead of a small knob when the trailer starts to push.
• A wired Tekonsha box you can buy new on Amazon: the Tekonsha Primus IQ. Its listing gives it proportional braking, an LED display, three Boost levels and support for up to three axles, one more than the Liberty, through a Tekonsha plug-in harness for your truck, sold separately. The P3 handles a fourth axle, and its five stored setups and electric-over-hydraulic support are on Tekonsha's P3 page. Tekonsha's Primus IQ page mentions no presets and says the Primus IQ hasn't been tested with electric-over-hydraulic brakes.
• No controller plug, or one controller for several vehicles: the CURT Echo. It plugs in between the truck's 7-way and the trailer, so nothing goes under the dash, and it moves between vehicles. Read its 7-way terms before you buy (below), and know that manual braking runs through the phone app or CURT's add-on button.

If your truck has a factory controller, keep it. Replacing it is your call, and you give up the dash integration that comes with it; Toyota advises against running a third-party controller alongside its own on the Tundra and Tacoma.

How the four compare

Specs come from Tekonsha's P3 page and manual, Tekonsha's Primus IQ page and each Amazon listing. Where a maker or listing doesn't state a line, the table says so rather than guessing. All four brake proportionally; none of them is a time-delay unit.

Which route fits your truck

Here's where we'd start on each truck we cover, based on what the truck maker publishes about its own controller and about room for an add-on, plus what owners report. The two middle columns cite one recent model year per generation, so check the manual for your own year. The last column names a route, not a confirmed fit: we haven't matched a harness or a 7-way on any truck ourselves.

The documents behind those cells: Ford's 2026 F-150, 2026 Ranger and 2026 Maverick towing guides; GM's 2025 Silverado 1500 and Colorado manuals and Chevrolet's 2026 trailering guide; Ram's 2025 Ram 1500 manual; and Toyota's manuals for the 2025 Tundra, 2025 Tacoma and 2023 Tacoma. Our brake controller decision guide lists every source by page, plus the trailer weights where each truck maker wants trailer brakes.

The short version for the three trucks we hear about most: on a Gen14 F-150, order the Tow/Haul Package and the factory controller comes with it, and since owners report dealers adding Ford's controller after the sale, ask a dealer before you buy anything else. On a Ram DT, adaptive cruise decides it: if you tow on it, only the integrated module will brake the trailer when the cruise slows the truck. On a Tacoma, the generation decides it: on a 3rd gen with the towing package, Toyota's service connector makes the P3 a plug-in job with Tekonsha's Toyota harness, and the 4th gen without Toyota's controller is where the Echo earns its place.

A tow package and a 7-pin plug on the bumper don't prove there's a controller plug under the dash. Look before you order a harness.

Proportional, and factory where you can get it

Add-on controllers come in two kinds. A time-delay controller ramps the trailer brakes up over a set time once you press the pedal, and Lippert lists no automatic adjustment among its drawbacks. A proportional controller reads deceleration with an accelerometer or inertia sensor and applies the trailer brakes to match; Tekonsha's P3 page describes it as braking based on how hard and how fast you apply the truck's brakes. Every pick here is proportional, and we wouldn't buy anything else.

The factory controllers go a step further. Ford's sets trailer braking from the pressure on the truck's brakes. GM's works with the truck's antilock brakes and stability control and trims trailer brake output to limit trailer wheel lock-up when those systems step in. That integration is why we'd take the factory unit on the order sheet over any add-on, and why an add-on is the right buy only when the truck didn't come with one and can't easily get one, or when one controller has to move between vehicles. Owners don't agree on feel; some find a good aftermarket controller stronger and more adjustable than the factory one.

Wireless controllers: read the 7-way terms first

A wireless controller like the Echo solves the no-plug problem, and its listing sets conditions you have to meet. CURT's Echo listing says the truck's 7-way must provide live +12V power, ground and turn-signal circuits, that some trucks need tow/haul mode or trailer detection before that power turns on, and that an existing factory or aftermarket controller won't work while the Echo is installed. Check the 7-way before you buy anything that depends on it.

CURT's Echo installation manual names one of our trucks: it warns that 2015-2017 F-150s may turn off the 7-way's +12V output in park or while shifting, which makes the factory wiring incompatible with the Echo, and sends those owners to a CURT authorized installer.

Then there's the manual control. On a phone-only controller, testing the brakes and applying them by hand both run through the app, and CURT's Echo listing says to keep the app in the foreground for a prompt manual-override response. CURT sells a separate Bluetooth override button for the Echo, and its page says the app still has to be running for the button to work. CURT says the Echo keeps its last settings if Bluetooth drops, so it still brakes; what you lose is the manual control.

We'd treat the Echo as the answer for a truck that has no plug and won't get one, or for a controller that moves between several vehicles, and not as a first choice for a truck with a factory plug. Owners who moved from an Echo to a P3 describe low-speed braking that stayed grabby however they set it, and even a two-year owner who calls it excellent names low-speed braking as the weak spot. A wired controller with a lever takes the phone out of the loop.

Sway, adaptive cruise and your truck's ratings

• Trailer brakes: whether your trailer needs its own brakes is set by your truck maker, your trailer maker and state law, so check all three before you tow without them.
• Adaptive cruise: Ram's 2025 1500 manual says aftermarket controllers won't apply the trailer brakes when adaptive cruise is braking, and recommends adaptive cruise for towing only with the integrated controller. GM's 2025 Silverado 1500 manual says to disengage adaptive cruise before applying an aftermarket controller's manual brake.
• Sway: Ford's 2026 F-150 towing guide and Chevrolet's 2026 trailering guide give the same driving rule for sway with electric trailer brakes: apply the trailer brakes by hand with the brake controller and stay off the truck's brake pedal until the sway stops. Ford's 2020 F-150 and 2025 Ranger manuals say the reverse about the integrated controller's lever: use it only to set the gain, because applying it during sway could cause instability. Follow the manual for your own truck.

A brake controller helps the trailer stop. No brake controller raises your truck's tow, payload or tongue-weight ratings, and trailer brakes don't change what the truck can pull. The lowest rating in the chain decides what you can tow, and that list includes your truck's tow rating for its exact configuration, its payload and axle ratings, the receiver, the hitch, the ball and the trailer's own ratings. Tow ratings change with cab, bed, engine, axle ratio and package, and they live in your owner's manual, the towing guide for your model year and the label on the driver's door jamb.

Installing any of these follows the controller maker's manual and the harness maker's instructions, not a forum's wire colors. Where a truck has no plug and the controller has to be spliced in, have a shop do it unless you're confident with automotive wiring.

Trailer weight decides more than the controller. Our guide to whether you need a weight distribution hitch lays out each truck maker's rule for the hitch.

If it were our truck

We'd order the factory controller and skip this whole decision. Without one, we'd look under the dash first. A plug and room at the knee gets a genuine P3 from a Tekonsha dealer; a plug and a tight footwell gets the Liberty, if one or two axles covers the trailer. No plug, and a 7-way with live power, gets the Echo, with the override button on the dash and the app open whenever we tow.