BMW 7 Series 2007–2011 — technical service bulletin
Bulletin SB-11-04-11 · NHTSA communication 10039764 · issued Jun 1, 2011
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007–2011
model years
9
vehicle entries
Official summary
Bmw: a noise is heard from the engine while running. The alternator drive belt tensioner is loose and/or shows wear. *rm
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.