BMW 640I 2012–2013 — technical service bulletin
Bulletin 330212 · NHTSA communication 10149341 · issued Apr 1, 2013
Technical service bulletin
communication type
Suspension
component
2012–2013
model years
5
vehicle entries
Official summary
Rattling Noise from Rear Axle. A rattling noise is heard from the rear axle when driving over rough or uneven road surfaces. Internal tolerances of front and rear shocks
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.