Metra's 70-8114 harness allows you to connect the steering wheel audio controls in 2003-up Toyota-built vehicles (if equipped) to a new car stereo without having to splice into your factory wiring.
Once you've connected this harness to your new receiver's rear RCA auxiliary input, you'll also be able to use the handy auxiliary input in your Toyota. This adapter will work with any 2003-up Toyota, Lexus, and Scion vehicle equipped with steering wheel audio controls. Warranty: 60 days.
Important note: The aftermarket radio you install must have a rear RCA auxiliary input if you wish to retain your factory auxiliary input.