Porsche 718 Boxster 2021–2026 — technical service bulletin
Bulletin No. 35-25 · NHTSA communication 11022899 · issued Aug 12, 2025
Technical service bulletin
communication type
Engine
component
2021–2026
model years
60
vehicle entries
Official summary
Manufacturers certificate for an Overview of Approved Porsche C40 Engine Oils
Vehicles covered
- 2021 Porsche 718 Boxster
- 2022 Porsche 718 Boxster
- 2023 Porsche 718 Boxster
- 2025 Porsche 718 Boxster
- 2021 Porsche 718 Boxster GTS
- 2022 Porsche 718 Boxster GTS
- 2023 Porsche 718 Boxster GTS
- 2024 Porsche 718 Boxster GTS
- 2021 Porsche 718 Boxster S
- 2022 Porsche 718 Boxster S
- 2023 Porsche 718 Boxster S
- 2024 Porsche 718 Boxster S
- 2021 Porsche 718 Cayman
- 2022 Porsche 718 Cayman
- 2023 Porsche 718 Cayman
- 2026 Porsche 718 Cayman
- 2023 Porsche 718 Cayman GT4
- 2024 Porsche 718 Cayman GT4
- 2024 Porsche 718 Cayman GT4 RS
- 2022 Porsche 718 Cayman GTS
- 2023 Porsche 718 Cayman GTS
- 2024 Porsche 718 Cayman GTS
- 2021 Porsche 718 Cayman S
- 2022 Porsche 718 Cayman S
- 2023 Porsche 718 Cayman S
- 2021 Porsche 718 Spyder
- 2022 Porsche 718 Spyder
- 2023 Porsche 718 Spyder
- 2024 Porsche 718 Spyder
- 2025 Porsche 718 Spyder
- 2024 Porsche 718 Spyder RS
- 2021 Porsche 911
- 2022 Porsche 911
- 2023 Porsche 911
- 2024 Porsche 911
- 2025 Porsche 911
- 2026 Porsche 911
- 2022 Porsche 911 4S
- 2021 Porsche 911 Carrera
- 2022 Porsche 911 Carrera
- 2023 Porsche 911 Carrera
- 2024 Porsche 911 Carrera
- 2025 Porsche 911 Carrera
- 2023 Porsche 911 Carrera 4
- 2022 Porsche 911 Carrera 4 GTS
- 2023 Porsche 911 Carrera 4 GTS
- 2023 Porsche 911 Carrera 4S
- 2022 Porsche 911 Carrera GTS
- 2023 Porsche 911 Carrera GTS
- 2024 Porsche 911 Carrera GTS
- 2021 Porsche 911 Carrera S
- 2023 Porsche 911 Carrera S
- 2023 Porsche 911 Carrera T
- 2024 Porsche 911 Carrera T
- 2023 Porsche 911 Dakar
- 2024 Porsche 911 Dakar
- 2021 Porsche 911 GT3
- 2022 Porsche 911 GT3
- 2023 Porsche 911 GT3
- 2024 Porsche 911 GT3
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.