Today, Bloomberg is reporting that the engine bolt issue has expanded into a recall for several world markets, involving some 489,000 vehicles. BMW was able to verify that report to Autoblog, while also providing a great deal more detail about the issue and vehicles affected.
The recall affects vehicles powered by N55 inline six-cylinder gasoline engines equipped with VANOS and Valvetronic technologies. 1 Series, 3 Series, 5 Series and 5 Series Gran Turismo, X3, X5, X6 and Z4 models from the 2010 to 2012 model years are included, as is the 2012 6 Series.
In total, 156,137 vehicles in the US are affected by the recall, which BMW says was filed with the National Highway Traffic Safety Administration late on Wednesday.
In rare cases, the bolts holding the VANOS unit housing may become loose, or, in "extreme" cases, break. A broken bolt may trigger an engine warning light or send the engine into safe mode if the VANOS unit is compromised. Ignoring the issue could cause "no start conditions," stalling and further engine damage.
As you might suspect, BMW recommends that owners observing engine warning lights should arrange for service.
NHTSA has yet to issue its own recall notice, though presumably they are forthcoming, and BMW's own statement can be seen below.
2010-12 1 Series
2010-12 3 Series
2010-2012 5 Series
2010-12 5 Series Gran Turismo
2012 6 Series
2010-2012 X3 SAV
2010-12 X5 SAV
2010-12 X6 SAV
Drivers of potentially affected vehicles may continue to drive their vehicles, however, if they observe a "Check Engine" or "Service Engine Soon" lamp and Check Control message warning, drivers should immediately contact their nearest authorized BMW center to arrange service. In the event of stalling, drivers should carefully move away from traffic and stop the vehicle in a safe location as soon as possible. They should contact BMW Roadside Assistance at 1-800-332-4269 to have the vehicle brought to the nearest authorized BMW center. They should not continue to drive their vehicle.
Owners of potentially affected vehicles will be contacted by BMW Customer Relations via first-class mail, to inform them of the recall and, when parts are available, will receive a second notification that will advise them to make an appointment with their authorized BMW center in order to have the repair made. Customers with questions should contact BMW Customer Relations at 1-800-525-7417 or email firstname.lastname@example.org.