BMW 3 Series 2003–2008 — technical service bulletin
Bulletin SI-B11-01-08 · NHTSA communication 10026205 · issued Apr 1, 2008
Technical service bulletin
communication type
Equipment
component
2003–2008
model years
16
vehicle entries
Official summary
Bmw: replace the chain tensioning rail bearing bolt that could come loose and cause damage to the engine. Models e60 (5 series), e70 (x5 series), e83 (x3 series), e9x (3 series). *pe
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.