BMW X5 2009 — technical service bulletin
Bulletin SI-B12-22-09 · NHTSA communication 10031664 · issued Sep 1, 2009
Technical service bulletin
communication type
Electrical System
component
2009
model years
2
vehicle entries
Official summary
Bmw: the spark plugs in the affected suvs may not adhere to the durability requirements. Microcracks in the ceramic insulator of the spark plug may occur, which could result in engine misfiring and rough running, especially at higher engine speeds. 750i, 750li, x5 m, and x6 m vehicles. *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.