Recommended Brake Controller and Custom Fit Harness for a 2021 Toyota 4Runner w/ the Tow Package
Updated 04/18/2026 | Published 04/17/2026 >
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Question:
I have a 2021 Toyota 4Runner Nightshade and am looking at the Redarc tow pro liberty brake controller w/harness. I want to plug it in via an existing electrical adaptor in the 4Runner. Someone told me I need a Curt 51362 adaptor in order to make it work right out of the box. Please advise. Thank you
asked by: Michael B
Expert Reply:
Hey Michael, thanks for the information! The Redarc Tow-Pro Liberty Brake Controller w/ Custom Harness item # RED98CR comes with everything you'll need for your 2021 Toyota 4Runner. You will not need a Curt adapter.
The Redarc item # RED98CR includes the brake controller and a custom fit wiring harness. The harness is designed to plug directly into the factory adaptor to the left of the emergency brake pedal. I attached a picture below of where it's located so you can verify this is the same one you're referring to.
What kind of trailer are you towing?
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Product Page this Question was Asked From
Redarc Tow-Pro Liberty Brake Controller w/ Custom Harness - Dash Knob - Up to 2 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Plug-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 2 Axles
- Indicator Lights
- Single Trailer Only
- Redarc
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Michael B.
4/18/2026
I appreciate your help, it looks like it is a perfect match. I am ordering one right now! Thank you for your quick response and professionalism. Michael