This adapter is used to install an aftermarket Headunit/Stereo Receiver in a 2007-up Subaru or Nissan. Harness includes VSS and SWC pins. This is an upgraded version of the Metra 70-7552. You must purchase an AXXESS ASWC-1 or similar steering wheel interface module to connect to this module. This harness only includes the wires that go to the steering wheel switches. If you need assistance programming the AXXESS ASWC-1 please contact us (or AXXESS support)