Service bulletin A911267 2029197-

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

Customer states volume fluctuates unnaturally. This may be described as significant increases in Bass or Treble levels shortly after startup, in conjunction with Park Aid, or during normal driving. Only applies to vehicles equipped with BOSE sound system (PR No. 8RY) Vehicles with a BOSE sound system in conjunction with AudioPilot are equipped with dynamic driving noise compensation. It adjusts playback volume and/or equalization depending on noise inside the vehicle. This function is perceived as a flat increase in volume as the cabin noise increases, usually due to increases in speed. In some vehicles, issues with the vehicle microphones may cause the volume to noticeably change at times when it is not necessary, such as in a parking lot, or when backing out of a driveway.

The document

• NHTSA's copy of the document (PDF)
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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, Equipment and accessories

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

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