BMW Z4 2009–2015 — technical service bulletin
Bulletin 540414 · NHTSA communication 10148327 · issued May 1, 2014
Technical service bulletin
communication type
Electrical System
component
2009–2015
model years
7
vehicle entries
Official summary
Service Action: Wiring Harness Sensor Rear Module. The wiring harness for the convertible top rear module sensor may be positioned incorrectly, which can cause damage to the wiring harness. Incorrect positioning of the convertible top rear module sensor connector AFFECTED VEHICLES This Service Action involves E89 (Z4) vehicles produced from March 26, 2014 to April 1, 2014. First check if a Service Action label with a code number 686 is already attached to the B-pillar. If a code number 686 has been punched out, the Campaign has already been performed and no further action is necessary. Vehicle
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.