Toyota Highlander Hybrid 2021–2025 — technical service bulletin
Bulletin T-TT-0771-25 · NHTSA communication 11014205 · issued Jan 28, 2025
Technical service bulletin
communication type
Engine
component
2021–2025
model years
20
vehicle entries
Official summary
Some 2021-2025 MY Highlander HV, Sienna HV, RAV4, and RAV4 HV, may exhibit an oil leak from the area where the camshaft cover, camshaft housing, and the timing chain covers meet. This is typically seen on the exhaust side of the engine.
Vehicles covered
- 2021 Toyota Highlander Hybrid
- 2022 Toyota Highlander Hybrid
- 2023 Toyota Highlander Hybrid
- 2024 Toyota Highlander Hybrid
- 2025 Toyota Highlander Hybrid
- 2021 Toyota RAV4
- 2022 Toyota RAV4
- 2023 Toyota RAV4
- 2024 Toyota RAV4
- 2025 Toyota RAV4
- 2021 Toyota RAV4 Hybrid
- 2022 Toyota RAV4 Hybrid
- 2023 Toyota RAV4 Hybrid
- 2024 Toyota RAV4 Hybrid
- 2025 Toyota RAV4 Hybrid
- 2021 Toyota Sienna Hybrid
- 2022 Toyota Sienna Hybrid
- 2023 Toyota Sienna Hybrid
- 2024 Toyota Sienna Hybrid
- 2025 Toyota Sienna Hybrid
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.