BMW · Canada · Mod
BMW 5 Series, 7 Series: Powertrain
Affects BMW 5 Series, 7 Series · 1998 — about 75 vehicles.
The hazard
On certain 540I, 540IA, 740IA, 740ILA and 750ILA, the differential pinion shaft in the differential case assembly was not properly surface hardened. This condition will result in premature wear which can lead to noisy operation and ultimately to a lack of drive capability through the rear axle. Correction: Entire differential assembly will be replace on affected vehicles.
What to do
Contact your dealer; the remedy details were not included in the filing.
Critical — crash/injury risk now
High — injury risk; see remedy
Moderate — fix at next service
Low — minor / informational