BMW 540I 1997 — technical service bulletin
Bulletin 11 05 97 · NHTSA communication 53344 · issued Jul 1, 1997
Technical service bulletin
communication type
Structure
component
1997
model years
3
vehicle entries
Official summary
Left side engine support may contact the front subframe, causing a drone noise. *ak
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.