Back-up Sensors You'll soon be zipping in and out of parking spots you may previously have passed over as too small with the back-up sensors. Help yourself in or out of a tight spot, while helping to protect your paint (and the paint on other people's cars, too). Color-matched to your vehicle Four sensors emit audible beeps into the cabin while you back up, signaling objects as you approach them. Those beeps quicken as your vehicle gets close to objects MSRP $519.00