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Service bulletins for the 2011 Mazda MX-5

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.

207 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
07-002-19-3616a2019-12-20. Service bulletin. EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER; EQUIPMENT ADAPTIVE/MOBILITY. A musty/mildew type odor may come from the vents when the air conditioning (A/C) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the result of mold growth in the A/C evaporator/cooling unit which is caused by condensation, dust, and pollen within the cooling unit. This condition is usually worse during high humidity conditions. “Mazda Air Cooling Coil Coating” is available to encapsulate the mold to reduce odors. If the product is properly applied, it can effectively reduce the musty/mildew odor for up to three years. NOTE: See parts information for Mazda Air Cooling Coil Coating and Kit part numbers.
07-002-19-36162019-08-01. Service bulletin. EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER. A musty/mildew type odor may come from the vents when the air conditioning (A/C) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the result of mold growth in the A/C evaporator/cooling unit which is caused by condensation, dust, and pollen within the cooling unit. This condition is usually worse during high humidity conditions. "Mazda Air Cooling Coil Coating" is available to encapsulate the mold to reduce odors. If the product is properly applied, it can effectively reduce the musty/mildew odor for up to three years.
07-002-18-34322018-05-14. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A musty/mildew type odor may come from the vents when the air conditioning (A/C) system is operating. It is most noticeable when the A/C is first turned ON. This odor is the result of mold growth in the A/Cevaporator/cooling unit which is caused by condensation, dust, and pollen within the cooling unit. This condition is usually worse during high humidity conditions. "Mazda Air Cooling Coil Coating" is available to encapsulate the mold to reduce odors. If the product is properly applied, it can effectively reduce the musty/mildew odor for up to three years. NOTE: See parts information for Mazda Air Cooling Coil Coating and Kit part numbers. This treatment provides a durable coating that will aid to prevent biological reactions that lead to odorconcerns. It is applied to the evaporator in a misted form that is introduced by way of the cabin air filter, the re-circulate door, the blower motor resistor access, or the blower motor air intake. Proper application requires the evaporator surface to be: Relatively clean and free of leaves, dust build-up and debris. Thoroughly dried, and the product cured onto it after application. NOTE: Keep the cooling unit dry by leaving the blower fan ON (at least on low), even if the A/C is not being used. In low humidity (dry) conditions, keep the ventilation system in the "FRESH" mode all the time, or as much as possible. In high humidity conditions, or if the air has a lot of dust or pollen, keep the system in the "RECIRCULATION" mode. A few minutes before reaching a destination, turn the A/C OFF, but leave the blower fan ON. This stops the accumulation of condensation on the evaporator/cooling unit, and it helps dry the inside of the cooling unit. A/C odor is not unique to Mazda vehicles as it will occur in other makes and models. To minimize A/C odor, suggest the following to the customers.
07-002-13-28422017-04-24. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A MUSTY/MILDEW TYPE ODOR MAY COME FROM THE VENTS WHEN THE AIR CONDITIONING (A/C) SYSTEM IS OPERATING. IT IS MOST NOTICEABLE WHEN THE A/C IS FIRST TURNED ON. THIS ODOR IS THE RESULT OF MOLD GROWTH IN THE A/C EVAPORATOR/COOLING UNIT WHICH IS CAUSED BY CONDENSATION, DUST, AND POLLEN WITHIN THE COOLING UNIT. THIS CONDITION IS USUALLY WORSE DURING HIGH HUMIDITY CONDITIONS. “MAZDA AIR COOLING COIL COATING” IS AVAILABLE TO ENCAPSULATE THE MOLD TO REDUCE ODORS. IF THE PRODUCT IS PROPERLY APPLIED, IT CAN EFFECTIVELY REDUCE THE MUSTY/MILDEW ODOR FOR UP TO THREE YEARS.NOTE:SEE PARTS INFORMATION FOR MAZDA AIR COOLING COIL COATING AND KIT PART NUMBERS.
MTI_10342017-02-13. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. THIS ARTICLE PROVIDES HVAC HEATER/DEFROSTER OPERATING TIPS USING MODE SELECTOR DIAL. THIS INCLUDES THE USE OF INTERMEDIATE POSITIONS.
MTI_10342017-02-10. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:HEATER CORE. THIS ARTICLE PROVIDES HVAC HEATER/DEFROSTER OPERATING TIPS USING MODE SELECTOR DIAL. THIS INCLUDES THE USE OF INTERMEDIATE POSITIONS.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.