BMW Guides & Blog - Bimmer Expert Code

Plain-language guides to BMW and MINI modules, fault codes and coding. Each guide explains what a part does, why it fails and how it is fixed, written by the team behind Bimmer Expert Code’s remote coding services.

Latest guides

BMW SME high-voltage battery management module circuit board

High-voltage systems

What Is the BMW SME? High-Voltage Battery Module Explained

What the SME does, which BMWs have one, why it locks after a crash and how SME faults are fixed.

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