Service bulletin M640216

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	10151231
Published by NHTSA	2018-12-10
Manufacturer's number	M640216
Manufacturer's date	2016-03-01
NHTSA component	EQUIPMENT:APPLIANCE:AIR CONDITIONER

NHTSA's summary

"Air Conditioning Refrigerant R1234yf Introduction. INFORMATION Highlights of R-1234yf Meets SAE J2888_201301 ""This SAE Standard covers fittings, couplers, and hoses intended for connecting service hoses from mobile air- conditioning Systems to service equipment such as charging, recovery and recycling equipment"". New tools and equipment are required. To service vehicles equipped with R-1234yf refer to SI M04 01 16. Air conditioning technician certification is required to work on system. Refer to your State Law. Unique low and high side fittings. Revised evaporator core as per SAE J2842. System will use about 5% more refrigerant than a comparable R134a system. System oil is a specific PAG oil. Refer to ISTA repair recommendation. Do not interchange components between systems using other refrigerants. Do not reuse Seals / O-ring material from another system. The system piping has internal heat exchangers (IHX or IWT). SAFETY INFORMATION Several precautions need to be observed when working on automotive air conditioning systems: Always wear eye protection and gloves while handling refrigerant or servicing air conditioning system. Avoid breathing R1234yf lubricant vapor or mist. Use only approved service equipment to discharge A/C systems. If refrigerant or compressor oil contacts the skin or eyes, large quantities of cool water should be used to flush the affected area. Never heat a refrigerant container with an open flame. Keep all refrigerant away from open flames. Under no circumstances should R1234yf service equipment or vehicle A/C systems be pressure tested or leak tested with air/R1234yf mixtures. NOTE: The use of compressed air (shop air) for leak detection in an R1234yf system can contaminate the system and/or refrigerant with moisture. Leak detection equipment that meets the SAE J2791 standard will work with R1234yf Never use fittings for an R12 or R134a system on an R1234yf system. Any difficulty in connecting service equipment may be an indication of ref

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
MINI CLUBMAN	2017
MINI COOPER	2014 to 2015
MINI COOPER	2017
MINI COOPER CONVERTIBLE	2016
MINI COOPER S	2014 to 2017
MINI JOHN COOPER WORKS	2015 to 2017

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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M310115	2021-08-09. Service bulletin. A groaning and/or squeaking noise from the front axle occurs when turning at low speeds or idle
M520119	2020-12-21. Service bulletin. NOISE DURING FORWARD / BACK SEAT ADJUSTMENT OVER THE ENTIRE LENGTH OF TRAVEL: A loud screeching noise can be heard from the front driver's or passenger's seat during forward/back seat adjustment.
M640220	2020-11-23. Service bulletin. CONDENSATION FROM AIR CONDITIONING LEAKS INTO PASSENGER FOOTWELL: Condensation from the air conditioning systems evaporator drips, below the instrument panel, into the passenger's footwell. During assembly, the cover of the fresh air intake was not fully seated when the screws were tightened. This cover can then leak condensation out through the existing gap.
M640120	2020-11-23. Service bulletin. BUZZING NOISE IS HEARD WHEN AIR CONDITIONING IS DEACTIVATED: A buzzing noise is heard when the air conditioning (A/C) is deactivated while the vehicle is in park or neutral. Prior to turning off the A/C, the system was functional and cooling properly. A/C compressor, or The power supply to the A/C compressor is too low.
M640220	2020-11-16. Service bulletin. CONDENSATION FROM AIR CONDITIONING LEAKS INTO PASSENGER FOOTWELL: Condensation from the air conditioning systems evaporator drips, below the instrument panel, into the passenger's footwell. During assembly, the cover of the fresh air intake was not fully seated when the screws were tightened. This cover can then leak condensation out through the existing gap.
M640120	2020-11-16. Service bulletin. BUZZING NOISE IS HEARD WHEN AIR CONDITIONING IS DEACTIVATED: A buzzing noise is heard when the air conditioning (A/C) is deactivated while the vehicle is in park or neutral. Prior to turning off the A/C, the system was functional and cooling properly. A/C compressor, or The power supply to the A/C compressor is too low.