Porsche Cayenne 2011–2014 — technical service bulletin
Bulletin 122-U5E8V-06 · NHTSA communication 10109263 · issued Aug 26, 2017
Technical service bulletin
communication type
Power Train
component
2011–2014
model years
4
vehicle entries
Official summary
Concerns: Rear-differential lock control unit Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. With the current data record for regulating the rear-differential lock, noises ("rattling") can occur in the rear axle area as a result of a certain driving style over the service life of the vehicle. This will not impair the function of the rear-differential lock.
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.