2021-2023 BMW X-Series Exterior Mirror Fault

Owners of certain 2021-2023 BMW X-Series vehicles, including the X3, X4, X5, X6, and X7, may encounter an exterior mirror fault. This issue, detailed in NHTSA communication 10238080, arises from a specific manufacturing change. Due to semiconductor supply constraints, the Local Interconnect Network (LIN) module in the exterior mirrors was sourced from a different supplier.

Symptoms of an Exterior Mirror Fault

The primary symptom owners might notice is an exterior mirror fault message or warning light appearing on the instrument cluster. This indicates that the vehicle's main controller has detected an anomaly within the mirror system. The underlying cause is an imprecise voltage measurement originating from the LIN module.

Root Cause: Semiconductor Supply Impact

The manufacturer communication explains that the Local Interconnect Network module in the exterior mirrors was switched to an alternative controller due to semiconductor supply issues. This new controller provides an imprecise voltage measurement. The main vehicle controller then misinterprets this inaccurate data as a fault within the mirror system. This directly leads to the reported BMW X5 exterior mirror fault.

What Owners Should Do

If you experience an exterior mirror fault in your 2021-2023 BMW X-Series vehicle, it is recommended to contact your authorized BMW dealership. They can diagnose the specific cause and determine if your vehicle is affected by the condition described in NHTSA communication 10238080. While the communication doesn't detail a specific repair, addressing the root cause typically involves a software update or replacement of the affected module.

It is important to have any warning lights or fault messages checked promptly by a qualified technician. This ensures proper functionality of your vehicle's exterior mirrors and related systems. Addressing the BMW X5 exterior mirror fault early can prevent potential inconveniences.

NHTSA ID: 10238080