2021-2024 BMW M Front Strut Noise TSB 31 01 24

Symptoms: Cracking or Clicking Front Strut Noise

Owners of certain 2021-2024 BMW M models may notice a distinct cracking or clicking type noise emanating from the front struts. This BMW M front strut noise is most commonly observed when the vehicle is on a lift and the front struts are in their fully extended position. The noise typically occurs when the steering wheel is turned left or right.

The sound may also reoccur briefly when the vehicle is lowered and the wheels are back under load. In some instances, this noise might be heard for a short duration while driving. BMW has addressed this specific concern with Service Information Bulletin 31 01 24.

Cause of the Noise: Side-Load Spring Design

The root cause of this BMW M front strut noise is attributed to the design of the side-load springs used in the affected Motorsport vehicles. These springs are engineered to handle specific forces during vehicle operation.

When these side-load springs are completely extended, such as when the vehicle is lifted, increased lateral forces are exerted on the thrust bearing. If a large steering angle is applied in this extended position, it can result in a relief cracking or clicking noise. This is a characteristic of the spring design interacting with the thrust bearing under these specific conditions.

Important Correction: What Owners Should Know

BMW Service Information Bulletin 31 01 24 clarifies that the cracking or clicking noise from the front struts is a normal operating sound of the thrust bearing. This sound is inherent to the design of the side-load springs when the struts are in the extended position.

Owners should be aware that a part exchange, such as replacing the thrust bearing or struts, will not resolve this condition. Furthermore, BMW explicitly states that part replacement for this specific noise is not permitted under warranty, as it is considered normal operation. This means that if you experience this BMW M front strut noise, no repair is necessary, and attempting to replace components will not provide a remedy.

Service Bulletin Details

This information is provided through BMW Service Information Bulletin 31 01 24, dated January 9, 2024. The bulletin applies to several BMW M models, including the F97 (X3 M Sports Activity Vehicle), F98 (X4 M Sports Activity Coupe), G80 (M3 Sedan), G82 (M4 Coupe), G83 (M4 Convertible), and G87 (M2 Coupe) for model years 2021-2024. The bulletin aims to provide technical guidance to technicians regarding the nature of this specific noise.

NHTSA ID: 10249016