LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> BMW >> 2013 >> M3 2D Convertible, Standard Trans >> Repair and Diagnosis (Single Page) >> General Information >> OEM General Information >> Functional Description -- M3 Convertible >> Restraints - Functional Description >> Crash Safety Module >> Diagnosis instructions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis instructions

NOTE: After 3 crash signals with triggering of the safety system, replace the ACSM control unit.

The ACSM control unit stores data in a non-erasable memory after a triggering of the safety system. After 3 crash signals, the data memory is full. The airbag warning lamp lights up. The ACSM control unit must be replaced.

Notes on coding/programming 

NOTE: Deactivating the acoustic seat belt warning

The acoustic seat belt warning can be disabled by means of coding. This does not affect a legally stipulated seat belt warning.