BMW 328 2007–2013 — technical service bulletin
Bulletin 540412 · NHTSA communication 10150112 · issued Mar 1, 2013
Technical service bulletin
communication type
Structure
component
2007–2013
model years
23
vehicle entries
Official summary
Retractable Hard Top (RHT) Is Not Stacking Properly - Frame Bent. The RHT frame is bent or twisted and cannot be operated in either direction, or the roof shells are not stacking properly. The hydraulic roof cylinders operate out of sequence causing the frame to twist.
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.