Porsche 718 2017–2020 — technical service bulletin

Bulletin No. 18-25 · NHTSA communication 11020147 · issued Jun 4, 2025

Technical service bulletin

communication type

Engine

component

2017–2020

model years

vehicle entries

Official summary

Manufacturers certificate for an Overview of Approved Porsche C20 Engine Oils. The vehicles affected are cars that use engine C20 oil as of MY 2021.

Vehicles covered

2017 Porsche 718
2017 Porsche 718 Boxster
2018 Porsche 718 Boxster
2019 Porsche 718 Boxster
2020 Porsche 718 Boxster
2017 Porsche 718 Boxster S
2018 Porsche 718 Boxster S
2019 Porsche 718 Boxster S
2020 Porsche 718 Boxster S
2017 Porsche 718 Cayman
2018 Porsche 718 Cayman
2019 Porsche 718 Cayman
2020 Porsche 718 Cayman
2017 Porsche 718 Cayman S
2018 Porsche 718 Cayman S
2019 Porsche 718 Cayman S
2020 Porsche 718 Cayman S
2018 Porsche 718 Spyder
2019 Porsche 718 Spyder
2020 Porsche 718 Spyder
2017 Porsche 911
2018 Porsche 911
2019 Porsche 911
2020 Porsche 911
2017 Porsche 911 Carrera
2020 Porsche 911 Carrera
2017 Porsche 911 Carrera S
2018 Porsche 911 Carrera S
2019 Porsche 911 Carrera S
2020 Porsche 911 Carrera S
2019 Porsche 911 GT2
2018 Porsche 911 GT2 RS
2019 Porsche 911 GT2 RS
2018 Porsche 911 GT3
2019 Porsche 911 GT3
2019 Porsche 911 GT3 RS
2017 Porsche 911 Targa 4
2018 Porsche 911 Targa 4
2019 Porsche 911 Targa 4
2020 Porsche 911 Targa 4
2017 Porsche 911 Turbo
2018 Porsche 911 Turbo
2019 Porsche 911 Turbo
2020 Porsche 911 Turbo
2020 Porsche Baby Seat Latch
2017 Porsche Boxster
2020 Porsche Boxster
2017 Porsche Cayenne
2018 Porsche Cayenne
2019 Porsche Cayenne
2020 Porsche Cayenne
2019 Porsche Cayenne E-Hybrid
2020 Porsche Cayenne E-Hybrid
2020 Porsche Cayenne GT
2018 Porsche Cayenne S
2019 Porsche Cayenne S
2020 Porsche Cayenne S
2017 Porsche Cayenne S E-Hybrid
2018 Porsche Cayenne S E-Hybrid
2020 Porsche Cayenne S E-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.