When installing an aftermarket radio, this vehicle-specific harnesses allows users to retain their factory-installed steering wheel controls without splicing into factory wiring. RCAs are included to enable the user to retain their factory-installed 3.5mm jack. The aftermarket radio must have AUX-IN. The AXSWC interface is required and sold separately. Check our Vehicle Fit Guide to see if an AXSWC harness is available for your vehicle as this product is dependent on vehicle application.