Originally Posted by CRAZYHAWK
Metra plug 70-7552 works on my 2009 Impreza 2.5i. Check with a radio installer for
the correct plug for a 2012. My plug cost $12.
2012 models except those with OEM nav still use the same 20-pin plug. But if your wheel has audio SWCs (or you would like to add them
), you'll want my harness that includes the extra SWC wires.
The OEM nav made by Fujitsu Ten has completely different harnesses. See this thread: 2012 STI Stereo Build with OEM NAV H/U
I've heard that some models still have the OEM Kenwood Navi HU. Wiring is the same as that HU used in previous years.