2021-2023 BMW 3 Series AC Not Blowing Cold Air TSB

Owners of certain 2021-2023 BMW 3 Series Plug-in Hybrid Electric Vehicles (PHEV) may experience issues with their air conditioning system. This manufacturer communication, identified by NHTSA ID 10218380, details symptoms related to inconsistent cooling performance and potential noise from a key AC component. The 2022 BMW 330i manufacturer_communication highlights concerns for several models.

Symptoms

Drivers may notice that the air conditioning system cycles from cold to warm air while driving or even when the vehicle is at a standstill. This cycling can be significant, with "vent outlet temperatures vary by 25 degrees Fahrenheit or more" (approximately 38°F to 60°F+ or 3°C to 15°C+). These temperature fluctuations occur without any changes to the climate control settings. Owners might also perceive a difference in cooling power between the left and right sides of the vehicle.

In some cases, the air conditioning may have stopped blowing cold air altogether. Additionally, a "rattling noise may also be heard coming from the electrical coolant condenser (EKMV)", indicating a potential problem with this specific component.

Owner Action

If you own a 2021-2023 BMW 330i, 330e, or M340i and are experiencing any of the described air conditioning symptoms, it is recommended to contact your authorized BMW dealership. Describe the symptoms, including any temperature fluctuations or rattling noises, to a service advisor. They can diagnose the issue based on the details provided in NHTSA Manufacturer Communication 10218380 and determine the appropriate repair.

Source: NHTSA Manufacturer Communication 10218380