NHTSA Complaint #11419860 — 2018 TOYOTA HIGHLANDER

Car is not properly wired to tow a trailer equipped with electric brakes. Toyota advertises the Highlander as having 5000 lb towing capacity. On the other hand, trailers weighing 3000 lb or more are required by law to be equipped with trailers brakes in most states. However, the Highlander's towing wire harness does not include the necessary wiring and 7-pin connector to power trailer brakes. Highlander OEM wiring harness only includes a 4-pin connector (which does not have output for a car-mounted brake controller nor 12V output to charge trailer's breakaway battery or power a trailer-mounted brake controller). Toyota's claim that the Highlander is capable of towing 5000 lb, but not equipping the car with essential safety equipment to do so is an unsafe condition (and false advertising). It could lead the car owners / operators to believe that it is acceptable to tow a 3000 lb or more trailer with the Highlander using the OEM 4-pin connector only, creating a serious safety hazard to themselves and other road users. Toyota should either equip the Highlander with proper wiring harness and 7-pin connector that allows the use of an on-board brake controller, or withdraw the towing capacity claim.