Dimensions Of The Mounting Panel for Redarc Tow-Pro Trailer Brake Controllers 331-TPSI-007

Updated 06/18/2026 | Published 06/09/2026

Products Featured in This Question

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

(249)

$13.00

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

(486)

$13.00

Question:

What are the dimensions of this housing?

asked by: James L

Expert Reply:

Hi James!

The Mounting Panel for Redarc Tow-Pro Trailer Brake Controller Control Knob # 331-TPSI-007 will have the follow measurements (keep in mind both of these are the face of the panel:

height: 1.58" (40 mm)
width: 0.88" (22 mm)

I do want to also mention that this is for a pretty specific year and model range of Toyota, so if that's not what you currently have, you may be more interested in the Universal Mounting Panel # Universal Mounting Panel # 331-TPSI-001. This measures 1.5" in height and 1" in width. The part that would snap into the dash also measures 15/16" (see included image). The instructions for this panel do say to drill a 1" hole in the dash to mount it, but I strongly recommend going with more of a 7/8" hole if you end up going in this direction.

On that note, what vehicle are you wanting this for and where are you wanting to mount it?

expert reply by: Lazer S

Universal Mounting Panel 331-TPSI-001 Dimensions
(click to enlarge)

James I.

6/9/2026

The vehicle is an airstream atlas 2024 which is built on a Mercedes Sprinter 3500 probably a 2023. There are numerous dummy panels that can be removed and replaced with one of the mounting panels rather than drilling a hole in my dash but the dummy removed measures 1 1/4 x 3/4. The 1 1/4 is perfect but the 3/4 is a problem if the mounting panels are 7/8. If that’s my only option I can remove two dummy panels and fabricate a plate to cover the opening. However, if there is a panel that will fit into a 3/4 width opening I would prefer to go in that direction. Thanks for the help, Jim

Lazer S.

6/9/2026

@JamesI Gotcha. I am not aware of any of these panels measuring 1-1/4" x 3/4". unfortunately. The closest Redarc looks to currently carry is the # RED93KR, but that will measure 1-1/4" tall x 7/8" wide. It's close, but I don't think it's close enough. Potentially silly question though, couldn't you pop out that dummy panel and mount the knob directly on it? Or is it one of those panels that needs to be cut out to remove it?

James I.

6/9/2026

Thanks Lazer S. That will be my first option. I may also be able to shave 1/8 off the parallel panel and make the 7/8 panel fit. Thanks for your help. I have a path forward at this point, Jim

Lazer S.

6/18/2026

@JamesI You're very welcome! Let me know if there is anything else I can help with! ^___^