Axxess AXSWCH-T28 SWC/Aux Retention radio wire harness Toy/Lex/Sub/Scion 12-Up. This harness is a retention harness only and the main radio harness is required is replace the OEM radio with an aftermarket radio. This harness will retain the factory AUX-IN jack and is prewired for the AXSWC ( Sold Separately)to retain steering wheel controls.