Use this harness to retain the factory reverse camera when adding an aftermarket radio or add an aftermarket camera to factory radio. Retains the factory back-up camera to an aftermarket radio. Or allows an aftermarket camera to be added to the factory screen. Works with display and navigation model radios only. Use with aftermarket radio that has a backup camera input feature only- usually radio with video screen. Compatibility Notes: Very Important- If retaining the factory camera- OEM Factory Camera uses 6 volt power so a 12v to 6v step down volt unit is required and sold separately- we see them sell for about $10 or so. New aftermarket radio must have backup camera input capability. Only works with factory radios with the Display screen or Navigation radios. Aftermarket camera will need the rca video plug to work with this. Works with the following vehicles: Scion: FR-S 2016, iM 2016, tC 2016; Toyota: 4-Runner 2014-2019, 86 (early build, before 12-17) 2018, 86 2017, Avalon (w/o nav) 2015-2018, Camry 2015-2016, Camry (late build, 12/14 onward) 2014-2014, Corolla 2014-2019, Corolla iM 2017-2018, Highlander 2014-2019, Prius (One, Two, Three, Three Touring) 2018, Prius 2016-2019, Prius C 2015-2019, Prius Prime (Plus) 2017-2018, Prius V 2015-2017, RAV4 2015-2018, RAV4 (after build date Nov. 2013) 2014, Sequoia 2014-2019, Sienna 2015-2017, Tacoma 2014-2019, Tundra 2014-2019, Venza 2015, Yaris 2018-2019