Infiniti M56 2011–2013 — technical service bulletin
Bulletin ITB-13-009 · NHTSA communication 10051787 · issued Sep 4, 2013
Technical service bulletin
communication type
Engine
component
2011–2013
model years
6
vehicle entries
Official summary
Infiniti: whine noise from engine area. If the noise does not increase with engine speed, the timing chain system may not be the cause. *js updated 10/29/2013 *js
Vehicles covered
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.