Toyota Highlander 2017–2019 — technical service bulletin
Bulletin Oil Cooler Pipe · NHTSA communication 10172372 · issued Jan 30, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2019
model years
3
vehicle entries
Official summary
Technical instructions: technical instructions for special service campaign 19tc04 oil cooler pipe certain 2017 ? 2019 highlander hv
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.