Troubleshooting BMW E46 325i (M54B25) central locking system failures

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Troubleshooting BMW E46 325i (M54B25) central locking system failures

Common issues:

• Doors not locking/unlocking
• Key fob not working
• Inconsistent operation

Diagnostic steps:

• Check key fob battery
• Inspect door lock actuators
• Test General Module (GM) functionality
• Check wiring for breaks or corrosion

Potential fixes:

• Replace key fob battery
• Rebuild or replace faulty door lock actuators
• Replace General Module if faulty
• Repair damaged wiring
• Reprogram key fobs if necessary

Note: The central locking system is integrated with the car's security system. Be cautious when working on these components to avoid triggering alarms or immobilizer issues.