Stereo Antenna Harness Adapter for Installing a New Radio Into a Subaru, Forester, 2009, 2010, 2011, 2012, 2013 Antenna adapter for installing a new Radio into a SUBARU FORESTER 2009, 2010, 2011, 2012, 2013 CarXtc adapter plugs directly into the antenna wire beyond the radio found in a FORESTER Plugs directly into your vehicle radio antenna harness behind the factory radio. Antenna adapter is needed for your SUBARU FORESTER 09, 10, 11, 12, 13 If installing an FM modulator you will need this and the reverse antenna adapter