Recommended Brake Controller for a 2021 Toyota 4Runner w/a Plug In Harness
Updated 10/30/2025 | Published 09/30/2025
Question:
Hey guys. I want to put a brake controller in my 2021 Toyota 4Runner trd pro. I want an easy full package plug and play, like the red arc with the harness that plugs into the 4Runner factory.
asked by: Brian M
Expert Reply:
Hey Brian, welcome back. To add a Redarc brake controller with a plug and play harness to your 2021 Toyota 4Runner, you'll want the Redarc Tow-Pro Liberty Brake Controller w/ Custom Harness item # RED82CR. This kit includes everything you need to get your brake controller installed. Along with the custom fit harness this kit comes with a custom panel that matches the dash knockouts on your 4-Runner.
Did you ever get your brakes and converter replaced?
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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
more information >
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on Trailer Brake Controller
Jerred H.
10/30/2025
Hey Brian, how did the Redarc Tow-Pro Liberty brake controller and harness work out on your 4Runner? Your experience could point others toward the best plug-and-play setup for their trucks.