Service bulletin ITB17-057

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10127442
Published by NHTSA	2018-01-29
Manufacturer's number	ITB17-057
Manufacturer's date	2017-12-01
NHTSA component	EQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

2011 - 2013 M AND M HYBRID, 2014-2015 Q70 AND Q70 HYBRID; POOR HEATER PERFORMANCE FROM THE PASSENGER SIDE IF YOU CONFIRM With the engine running at full operating temperature and the HVAC set to VENT (face) and 90°F on both sides, the VENT air temperature on the passenger side is more than 10°F colder than the VENT air temperature on the driver side, AND THEN When the HVAC control is adjusted to 60°F on both sides, there is a noticeable change from warm air to cool (A/C) air discharged from VENT on both sides. This confirms proper MIX door operation, NOTE: If the MIX door operation is abnormal, this bulletin does not apply. Refer to ASIST for further diagnostic information. AND No HVAC DTCs are stored. ACTION 1. Drain the engine coolant. 2. Modify the thermostat. 3. Flush the cooling system 3 times with Long Life Coolant. 4. Replace the heater core. 5. Replace the thermostat with gasket.

The document

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

Equipment and accessories, Heating and air conditioning

Vehicles listed
INFINITI M35 HYBRID	2012 (the catalog's model; the bulletin names a series or trim of it)
INFINITI M37	2011, 2012, 2013
INFINITI M37 HYBRID	2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
INFINITI M56	2011, 2012, 2013
INFINITI M56 HYBRID	2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
INFINITI Q70	2014, 2015
INFINITI Q70 HYBRID	2014, 2015 (the catalog's model; the bulletin names a series or trim of it)

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

Other bulletins for the same vehicles and component
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ITB09041A	2021-05-10. Service bulletin. IF YOU CONFIRM A refrigerant leak at a refrigerant pipe/hose joint location, ACTIONS 1. Inspect the metal surfaces of the pipe/hose joint for damage or contamination. NOTE: Do not replace a refrigerant pipe, hose, or other A/C component if an o-ring seal will solve the leak incident, if it should occur. 2. If no damage is found to the joint metal surfaces, replace the O-ring seal. See this bulletin for further detail.
ITB09063B	2021-05-10. Service bulletin. SERVICE INFORMATION Because of collision damage or other vehicle repair, a replacement "Certification Label" or "VIN Plate / Label" may be needed. These items may be available from Infiniti by request if certain criteria are met. This bulletinlists the criteria and provides an application form for such replacements. See this bulletin for further detail.
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