1Compatibility: Wiring harness is replacement for Highlander 2008?2019, fit for RX350 without Factory Tow Package 2020?2021, fit for RX350L without Factory Tow Package 2021. 2Part Number: Trailer wiring harness replace part number is 56217. Please double check the part number of your item to ensure perfect fit. 3Application: This 4 flat trailer wiring can be used to connect trailer taillights, brake signal lights and turn signal lights. 4Stable Performance: Abs material with reliable power, weather resistance, wear resistant, and long lasting performance. 5Simple Installation: The installation is simple, direct replacement, no modification is required, convenient for using, save your efforts.