BMW 3 Series, X5 +5 more: Engine

Affects BMW 3 Series, X5, X3, 5 Series, 1 Series, Z4, X6 · 2010–2012 — about 21K vehicles.

The hazard

Issue: On certain vehicles, the variable camshaft timing (VANOS) adjustment unit housing bolts could loosen or break. As a result, the camshaft could become incorrectly adjusted and cause the engine to enter a reduced power mode (limp mode) or to stall while driving. Safety Risk: A sudden loss of engine power could increase the risk of a crash. Corrective Actions: BMW will notify owners by mail and advise you to take your vehicle to a dealership to replace the VANOS bolts.

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