Toyota Highlander 2020–2022 — technical service bulletin
Bulletin T-SB-0021-23 · NHTSA communication 10238131 · issued May 11, 2023
Technical service bulletin
communication type
Electrical System
component
2020–2022
model years
7
vehicle entries
Official summary
TSB: Some 2020 ? 2022 model year Highlander and RAV4 vehicles, and 2022 model year Tundra vehicles equipped with a start/stop switch may exhibit water entry to the vehicle from the HVAC drain hose being disconnected from the air conditioning radiator assembly and/or a grease/oil odor emitting from the vents. This condition may be caused by paraffin wax leaking from the evaporator.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.