Infiniti QX56 2004 — technical service bulletin
Bulletin 04053 · NHTSA communication 10010102 · issued Oct 5, 2004
Technical service bulletin
communication type
Equipment
component
2004
model years
1
vehicle entries
Official summary
Humming noise from hvac system. *jb
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.