2021-2022 BMW Windshield Mist and HVAC Noise TSB

Symptoms

Owners of certain 2021-2022 BMW vehicles, including the 2022 BMW X3, may experience two distinct issues related to the climate control system. The first symptom is "Mist formation on the windshield inside surface," which can occur when departing or immediately after the automatic start/stop (MSA) system has been active. This can impair visibility and be a nuisance for drivers.

The second symptom is an "Acoustic abnormality in the area of the recirculated air flap." This noise is described as the "recirculation flap closing and opening several times." These issues may appear individually or in combination, indicating a potential problem with the vehicle's heating, ventilation, and air conditioning (HVAC) system.

Diagnosis and Trigger Conditions

The manufacturer communication highlights specific conditions under which these symptoms, such as the 2022 BMW X3 windshield mist, are most likely to occur. The misting and the recirculated air flap noise are often observed "at departure or after MSA (automatic start/stop)." This suggests a potential interaction between the engine's start/stop function and the HVAC system's operation, particularly regarding air circulation and humidity control. Technicians will likely focus their diagnostic efforts on these specific operational scenarios.

Repair Procedure Summary

While the manufacturer communication does not detail specific repair steps, it indicates that these issues, including the 2022 BMW X3 windshield mist, are recognized by BMW. Typically, such communications advise dealerships on diagnostic procedures and potential remedies, which often involve software updates to the climate control module or inspection and replacement of affected HVAC components like the recirculated air flap. Owners experiencing these symptoms should have their vehicle inspected by an authorized BMW service center.

Owner Action

If you own a 2021-2022 BMW model and are experiencing "Mist formation on the windshield inside surface" or an "Acoustic abnormality in the area of the recirculated air flap," it is recommended to contact your local BMW dealership. Inform them about the symptoms and reference manufacturer communication NHTSA ID 10214989. The dealership will be able to diagnose the specific cause and perform any necessary repairs or software updates.

NHTSA ID: 10214989