B0124
Theft Deterrent System Starter Disable
1995-1999 BMW 318ti E36 1.9L I4 🇩🇪
High SeverityBody
Description
The theft deterrent system has disabled the starter circuit due to a detected theft condition or system malfunction.
Symptoms
- Engine will not crank
- Security light on solid
- Key turns but starter does not engage
- No-crank no-start condition
Common Causes
- Theft system triggered by incorrect key
- System malfunction falsely detecting theft
- BCM starter relay driver failure
- Immobilizer-theft system communication error
Diagnostic Steps
- Verify key is correct for vehicle
- Perform theft system reset procedure
- Scan BCM and immobilizer codes
- Test starter relay control circuit
- Check theft system arm/disarm status
Repair Notes
Perform theft system relearn or reset. If BCM is faulty, replace and program.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
- B0011Driver Side Airbag Deployment Circuit Open
- B0012Driver Side Airbag Deployment Circuit Short to Ground
- B0013Driver Side Airbag Deployment Circuit Short to Battery
B0124 on Other Vehicles
Common Questions
What does code B0124 mean on a 1995-1999 BMW 318ti E36?
B0124 stands for "Theft Deterrent System Starter Disable". The theft deterrent system has disabled the starter circuit due to a detected theft condition or system malfunction.
What are the symptoms of B0124 on a BMW 318ti E36?
Common symptoms of B0124 include: Engine will not crank, Security light on solid, Key turns but starter does not engage, No-crank no-start condition.
What causes B0124 on a 1995-1999 BMW 318ti E36?
Common causes of B0124 include: Theft system triggered by incorrect key, System malfunction falsely detecting theft, BCM starter relay driver failure, Immobilizer-theft system communication error.