A:Answer I am not familiar with a retractable door on a Lexus SC430, but for any aftermarket radio, a metro, or similar, bracket kit will be necessary to support the radio in the vehicles opening. In addition to the metro bracket, the radio also needs the proper wiring harness to connect with the vehicle’s existing wiring. The other end of the wiring then needs to be connected to the radio. As for the steering wheel controls, a steering wheel control adapter is necessary and there is a jack on the radio for this called “remote”.