Compatible with 2004-2005 Saturn vehicles; connects an aftermarket radio to a vehicle's harness

Easily replace the factory radio in your BMW vehicle with this all-in-one Radio Replacement and Steering Wheel Control Interface by PAC. The RP4.2-BM21 interface comes pre-loaded with amplifier retention and steering wheel control software, navigation-based output signals and more to help simplify aftermarket radio installation while retaining your vehicle’s factory features. This radio replacement and steering wheel control interface is easily configurable using a PC application and is direct USB updatable.