Porsche Cayenne 2018–2023 — technical service bulletin

Bulletin No. 173-21 · NHTSA communication 11015091 · issued Jan 7, 2025

Technical service bulletin

communication type

Engine

component

2018–2023

model years

vehicle entries

Official summary

Technical information - Warning Message “Coolant Temperature Too High”: Checking Coolant Pump and Change - Over Valve (173/21)

Vehicles covered

2018 Porsche Cayenne
2019 Porsche Cayenne
2020 Porsche Cayenne
2021 Porsche Cayenne
2022 Porsche Cayenne
2023 Porsche Cayenne
2018 Porsche Macan
2019 Porsche Macan
2020 Porsche Macan
2021 Porsche Macan
2022 Porsche Macan
2023 Porsche Macan

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.