Recommended Brake Controller and Custom Fit Harness for a 2021 Toyota 4Runner w/ the Tow Package
Updated 04/18/2026 | Published 04/17/2026
Products Featured in This Question
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?
You can add this information, along with any other questions you have, where it says Add Comment.
(click to enlarge)
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
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Brake Controller
- Search Results: redarc mounting panel
- Shop: Redarc Tow-Pro Liberty Brake Controller w/ Custom Harness - Dash Knob - Up to 2 Axles - Proportional
- Search Results: curt trailer brake controller
- Search Results: brake controller
- Search Results: trimax locks trailer hitch ball mount
- Search Results: trailer tongue lock
- Search Results: trailer hitch lock
- Search Results: coupler lock
- Shop: Mounting Panel for Redarc Tow-Pro Trailer Brake Controller Control Knob
- Shop: Mounting Panel for Redarc Tow-Pro Elite Trailer Brake Controller Control Knob
- Shop: Mounting Panel for Redarc Tow-Pro Trailer Brake Controller Control Knob
- Shop: Mounting Panel for Redarc Tow-Pro Trailer Brake Controller Control Knob
- Shop: Mounting Panel for Redarc Tow-Pro Trailer Brake Controller Control Knob
- Video: Redarc Tow-Pro Trailer Brake Controller Plug-and-Play Wiring Harness Review
- Video: Redarc Tow-Pro Liberty Brake Controller Review RED24FR
- Video: Review of Swing King Folding Trailer Tongue - Coupler Hinge Kit - TD33FR
- Shop: Swagman Swivel Hitch Extender - 2" Hitches - Dual Side - Swing-Away Hitch Adapter
- Shop: Towing Mirrors
- Shop: BOLT brand vehicle and hitch locks
- Video: Feature Breakdown: Fastway Trailer Hitch Receiver Lock
- Video: All About the Curt Trailer Hitch Receiver Lock
- Video: Complete Breakdown of the Fastway Trailer Hitch Receiver Lock
- Video: Review of Trimax Locks Trailer Hitch Lock - Chrome Right Angle Receiver Lock - TMX56SR
- Q&A: How to Install A8000 Torklift All Terrain Landing Gear on Scissor Steps with Rivets
- Q&A: TorkLift GlowStep Scissor Steps Installation on a Truck Bed Camper
- Q&A: Mounting Hole and Overall Dimensions of the TorkLift GlowStep Stow N Go Mounting Bracket
- Q&A: Could Mounting Bracket of TorkLift GlowStep Scissor Steps # TLA7802-8000 Attach to Bottom of Step
- Q&A: Difference Between Redarc RED98CR And RED82CR For 2022 Toyota 4Runner
- Q&A: Parts Needed to Install a Red Arc Brake Controller in a 2023 Toyota Tacoma
on Trailer Brake Controller
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