Use these guides to plan and complete a compatible Porsche steering wheel retrofit with STMV1, STMV1-H, STMV1-971 or Adapter-X V2.
Before ordering or installing: review the steering wheel compatibility guide. If you are unsure which adapter or parts you need, email photos of your current and replacement steering wheels to info@gpsadapter.us.
Adapter installation
GPS Adapter hardware installation guide
General installation instructions for STMV1, STMV1-H, STMV1-971 and Adapter-X kits, including steering wheel removal and adapter connections.
Heating and clock spring
Add steering wheel heating and replace the clock spring
Learn how to replace the steering control module and clock spring, enable heated multifunction controls and calibrate the steering-angle sensor.
PIWIS coding
Sport Design to multifunction steering wheel coding guide
PIWIS coding steps for compatible Porsche 997.2, 987.2, 991.1, 981, 958 and 970 vehicles.
997.1 and 987.1 steering control module upgrade guide
Requirements and coding steps for fitting a multifunction PDK steering wheel to Porsche 997.1 and 987.1 models.
Safety
Steering wheel work involves the airbag and safety-critical components. Disconnect the vehicle battery, follow the official workshop procedure and use a qualified Porsche technician when you are not experienced with airbag, steering or PIWIS work.