Genuine Toyota trailer wire harness provides a 4-pin connector located on the trailer hitch to provide power to your trailer's brake lights, turn signals and taillights
Fits Sienna
Before towing, confirm that your vehicle and trailer are compatible, properly hooked up and loaded, and that you have any necessary additional equipment. Do not exceed any Weight Rating and follow all instructions in your Owner’s Manual. The maximum you can tow depends on the total weight of your cargo, occupants and available equipment.