Porsche Cayenne 2015–2018 — technical service bulletin
Bulletin No. 117-21 · NHTSA communication 10200875 · issued Aug 6, 2021
Technical service bulletin
communication type
Electrical System
component
2015–2018
model years
4
vehicle entries
Official summary
Instructions on how to remedy a message in the instrument cluster for 'Failure ABS/PSM' relating to a defect in one or more speed sensors.
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.