Shop Nilight 4 Pin Trailer Wiring Harness Kit 56083 Custom for 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 RX350 RX450h RX350L RX350hL Tow Package Required in high quality. No cutting or splicing factory wire. Plug and play harness. This trailer wiring harness kit plugs into existing factory wiring on your vehicle and equips it with a standard, rear 4-pin trailer wiring connector for plugging in and towing a trailer.