Does Computer of 2021 Toyota 4Runner Need Reprogramming After Brake Controller Installation

Updated 07/01/2021 | Published 06/30/2021

Products Featured in This Question

Redarc Tow-Pro Elite Brake Controller - Dash Knob - Off-Road Mode - Up to 3 Axles - Proportional

(1676)

$290.00

Mounting Panel for Redarc Tow-Pro Trailer Brake Controller Control Knob

(733)

$13.00

Redarc Tow-Pro Liberty Brake Controller - Dash Knob - Up to 2 Axles - Proportional

(2504)

$190.00

Plug-and-Play Wiring Harness for Redarc Tow-Pro Classic, Elite, or Liberty Trailer Brake Controllers

(308)

$35.00

Question:

I have been told the vehicle computer will need to be reprogrammed by Toyota when using this controller. Is this true?

asked by: Paul C

Helpful Expert Reply:

You won't need to reprogram the computer to install the Redarc # RED44FR Tow Pro Elite or any other brake controller on your 2021 4Runner.

Can I make a suggestion? The # RED44FR Tow Pro Elite you'd looked at features both a proportional and a user-controlled mode. The user-controlled mode makes the controller act like a time-delayed brake controller. Unless you're planning on doing some overland towing, you'll never ever need that feature and would be better off going with the all-proportional Tow Pro Liberty, part # RED24FR which is considerably less expensive. If you went that route, you wouldn't be paying extra for a feature you don't need.

Since your 4Runner has the factory tow package with the 7-way on the back bumper, the installation would be plug and play, using the # RED49FR wiring harness. The harness would plug into the tow package connector located above the dead pedal just above the kick panel. I'd also recommend a # 331-TPSI-002 mounting bezel for a factory installed appearance (see linked installation video).