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

Question:

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

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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).

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Mike L
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Instructions for RED24FRInstructions for RED44FR

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Redarc Tow-Pro Liberty Brake Controller Installation - 2018 Toyota 4Runner
Redarc Tow-Pro Liberty Brake Controller Installation - 2018 Toyota 4Runner - Video
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