Mounting Bracket for Tekonsha P3 Brake Controller

Tekonsha P3 mounting bracket

The Tekonsha P3 is a very popular brake controller for towing travel trailers. Unfortunately the 2 mounting brackets come with the P3 are poorly designed. The plastic bracket feels very flimsy; the 3 tiny screws come with it don’t provide much strength on soft plastic found in most car’s under-dash panels. This makes it almost impossible to securely mount the controller under dash panel. When I took the delivery from Spokane Airstream dealership, It fell off 2 hours into the return trip and I had to use duct tape as a temporary solution.

After I got home I designed a 3D printable mounting bracket and it has worked flawlessly in past 18 months.

  • It doesn’t require screws – The back of the bracket provides a large contact area so it can be securely mounted with double-sided tape (3M Scotch 5952 VHB). You can remove the bracket by sliding a string into the gap then move the string back and forth to loosen it up.
  • Low profile, it doesn’t stick out as much as the stock brackets, which makes it far less prone to your knee bumping into the controller when you get on/off your car.
  • The controller can be easily detached when it’s not in use.
3D printable Tekonsha P3 brake controller mounting bracket in action


  • Click here to download 3D printable STL files
  • Print them. it must be printed vertically, with support on print bed to provide great strength.
    Tekonsha P3 3d printable mounting bracket
  • Dry fit the bracket against the under-dash panel, It’s perfectly fine if the curve doesn’t match the panel perfectly – you can accommodate this by
    • Under-dash panel has a tighter curve than that of the bracket – apply double-sided tape at top and bottom edge of the bracket.
    • The Bracket has a tighter curve than that of the under-dash panel – apply 2 layers of double-sided tape at the top and bottom edges of the bracket
  • Important! Clean surfaces of under-dash panel, bracket using Isopropyl Alcohol. let them dry.
  • Apply double sided tape to mounting bracket, peel off the tape backing, press it against the under-dash panel for 30 seconds.
  • Let the bracket rest for 12 hours without inserting the brake controller.
  • As a bonus, I also designed a cable clip for controller’s cable management.

Hope this is useful, you can also find more 3D printable accessories for Airstreams here.

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