Infiniti M37 2011–2012 — technical service bulletin
Bulletin ITB-13-021 · NHTSA communication 10052395 · issued Jun 13, 2013
Technical service bulletin
communication type
Equipment
component
2011–2012
model years
4
vehicle entries
Official summary
Infiniti: while the compressor for the air conditioner is running, a whinnying or humming noise or low pitch moan sound, is heard inside of vehicle, model 2011-12 m37, m56. *pe
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.