2021 BMW 330i Ticking Noise from Driver's Footwell TSB

Owners of certain 2021 BMW 3 Series and 4 Series models may notice a distinct ticking noise originating from the driver's footwell. This issue, specifically affecting the 2021 BMW 330i, is detailed in NHTSA Manufacturer Communication 10182610. This 2021 BMW 330i manufacturer_communication provides guidance for addressing this specific concern.

Symptoms

The primary symptom is a ticking sound emanating from the driver's footwell. This noise is typically heard during light braking while the vehicle is coasting with the engine off. It occurs when the brake pedal is slightly pressed with minimum force, specifically without the brake light being activated. The OEM fault label for this condition is "TICKING NOISE FROM DRIVERS FOOTWELL DURING LIGHT BRAKING WHILE COASTING."

Diagnosis / Trigger Conditions

This ticking noise is specifically triggered under certain conditions related to the vehicle's SERVICE BRAKES, ELECTRICAL SYSTEM:SOFTWARE, and ENGINE components. The noise is reproducible when the vehicle is coasting with the engine off, and the brake pedal is lightly engaged. The key diagnostic condition is that the brake lights are not yet activated, indicating a very light application of the brake pedal.

Owner Action

If you are experiencing a ticking noise from your driver's footwell under these specific conditions, it is advisable to contact your authorized BMW service center. Reference NHTSA Manufacturer Communication 10182610 when discussing the issue. This 2021 BMW 330i manufacturer_communication indicates that BMW has identified and is addressing this concern.

Source: NHTSA ID 10182610