Mazda CX-7 2010–2012 — technical service bulletin
Bulletin 09-013-12-2649A · NHTSA communication 10097821 · issued Nov 30, 2012
Technical service bulletin
communication type
Equipment
component
2010–2012
model years
5
vehicle entries
Official summary
Some bose audio equipped vehicles may exhibit noise from the speakers when using a bluetooth enabled device, regardless of sound level. However, the noise does not occur when using a portable audio device that is connected to the vehicle s audio system via the auxiliary (aux) jack. This concern may be caused by an incorrect bluetooth unit music output level.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.