Service bulletin B122614

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

NHTSA's summary

"VANOS Faults Stored in DME (Bosch). The Service Engine Soon (MIL) is on and the engine could go into a reduced power mode with the ""Drivetrain Malfunction"" message displayed. NOTE: Exception to the following statement is the N55 engine produced prior to October 2011 which may exhibit unusual clattering noises in the area of the VANOS. One or more of the VANOS faults (listed in the attachment) are stored in the DME, although the engine is mechanically sound and no unusual noises can be heard from the VANOS area. Due to unfavorable Engine Position Management (EPM) parameters in the DME software, various VANOS control faults could be set. These control faults relate to implausible camshaft position (intake or exhaust), the camshaft stuck situation, or the camshaft angle offset to crankshaft outside the tolerance range. For vehicles with N55 engine produced up to October 2011 the bolts in the VANOS adjustment unit (intake or exhaust) may be loose or broken."

The document

• NHTSA's copy of the document (PDF)
• If that address does not open, try this one

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Software

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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