2021-2022 BMW X3 and X4 Whistling Noise TSB

Symptoms of the Whistling Noise

Owners of 2021-2022 BMW X3 and X4 vehicles may notice a distinct whistling noise. This sound typically comes from the right front area of the vehicle, specifically around the engine compartment bulkhead and fresh air inlet.

The BMW X3 whistling noise is most pronounced when driving at speeds exceeding 40 mph. It becomes loudest and most apparent when the vehicle's sunroof is open in the vent position.

Diagnosis and Trigger Conditions

This whistling noise is directly linked to the fresh air inlet area. The TSB indicates that the specific conditions for the noise to occur are:

• Vehicle speed above 40 mph.
• Sunroof positioned in the vent mode.

These conditions help technicians pinpoint the source of the BMW X3 whistling noise and differentiate it from other potential sounds.

Repair Procedure Summary

While the provided information does not detail a specific repair procedure, the TSB serves to inform technicians about the identified cause of the whistling noise. It indicates that the noise originates from the fresh air inlet area, particularly when the sunroof is in the vent position. Dealers will use this information to diagnose and address the issue.

What Owners Should Do

If you experience a whistling noise in your 2021-2022 BMW X3 or X4, especially under the described conditions, it is recommended to contact your authorized BMW dealer. Inform them about the specific symptoms you are experiencing, including when the noise occurs and if it's loudest with the sunroof vented.

Your dealer can then refer to the manufacturer communication to properly diagnose and resolve the whistling noise. Since this is a manufacturer communication, repairs related to this issue are typically covered under warranty if your vehicle is still within the warranty period.

NHTSA ID: 10211867