This adapter will enable you to replace your factory fitted stereo with an after market unit. It converts the cars original wiring plug into a standard ISO connection for all new stereos. You simply plug one end of the adapter into your cars original wiring harness, & the other end into the new stereo, no cutting of wires is necessary. Fits the following models: Subaru Legacy (1994 on) Subaru Impreza (1993 on) Subaru Forester (1997 on)