Repair when you can Engine and engine cooling
Loose or broken VANOS unit bolts can result in an engine stall, increasing the risk of a crash.
The aluminum bolts that secure the housing for the variable camshaft timing adjustment (VANOS) unit can loosen over time and possibly break.
What to do: Book it in at your next service. There is no deadline and no charge.
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Fire risk Engine and engine cooling
An electrical short can cause the PCV valve heater to overheat, increasing the risk of a fire while driving or, soon after driving when parked.
0si, X3 xDrive30i); 2008-2013 1 Series Convertible (128i); 2006-2011 3 Series Sedan (325i, 325xi, 328i, 328xi, 328i xDrive, 330i, 330xi); 2006-2012 3 Series Wagon (328i, 328i xDrive); 2007-2013 3 Series Convertible (328i); 2006-2010 5 Series Sedan (525i, 525xi, 528i, 528xi, 530i, 530xi); 2006-2007 5 Series Wagon (530xi); 2007-2010 X5 SAV (X5 3.0si, X5 xDrive30i); 2006-2008 Z4 Coupe (Z4 3.0si); and 2006-2011 Z4 Roadster (Z4 3.0i, Z4 3.0si, Z4 sDrive30i) vehicles. The heater for the positive crankcase ventilation (PCV) valve may short circuit.
What to do: Park away from buildings and book the repair now.
Park outside Electrical system
Overheating could lead to a fire, even while the vehicle is not in use.
The insulated bulkhead connector for the positive battery cable may have been incorrectly attached to the trunk floor panel, which can lead to a loosening of the bolt connection. As it loosens, an increase in electrical resistance at this cable connection is possible and could cause the cable connection to overheat.
What to do: Park away from your house, garage or anything that could catch fire, until it is repaired.
Repair soon Service brakes
Power assist braking performance could be adversely affected.
A check valve of the brake vacuum pump may leak a small amount of lubricating oil. Over time this could result in contamination of the brake booster.
What to do: Book this in with a dealer now. It affects a safety system.
Repair soon Fuel system
If this occurs, the fuel gauge in the instrument cluster would display a larger amount of fuel than was actually in the tank.
The vehicle's fuel level sensor within the fuel tank can become wedged against the tank.
What to do: Book this in with a dealer now. It affects a safety system.