One problem related to coolant leaking has been reported for the 2018 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Toyota Highlander based on all problems reported for the 2018 Highlander.
Since the first day of ownership (07/27/2018, this vehicle has the very pungent odor of antifreeze coming from outside the vehicle, driver side. After the engine reaches normal operating temperature. There are no visible signs of coolant leaking, either on the pavement or inside the engine compartment. There is no odor inside the car indicating a leaking heater core. The car is only eight months old and 4800 miles. This vehicle has been taken to the dealership three times with no solution yet.