Porsche Cayenne 2021 — technical service bulletin
Bulletin No. 205-21 · NHTSA communication 10231339 · issued Jan 11, 2023
Technical service bulletin
communication type
Electrical System
component
2021
model years
4
vehicle entries
Official summary
Technical information for a Message "Lane Change Assist Not Available â Service Necessary" in the instrument cluster: re-programming control units for lane change assist and, if applicable, radar sensor for front corner radar
Vehicles covered
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.