BMW 740I 2011–2012 — technical service bulletin
Bulletin B260516 · NHTSA communication 10149237 · issued May 1, 2017
Technical service bulletin
communication type
Power Train
component
2011–2012
model years
12
vehicle entries
Official summary
Service Action: Replace the Flexible Disc on the rear driveshaft. The flexible disc (giubo) that connects the rear driveshaft to the transfer case may crack. Excessive angular load on the flexible disc on the driveshaft.
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.