Passenger Frontal Stage 2 Deployment Control
1996-1999 BMW 318i E36 1.9L I4 M44
Description
Malfunction in the passenger frontal airbag stage 2 deployment circuit. The stage 2 inflator provides additional inflation force during severe frontal collisions.
Symptoms
- Airbag warning light on
- Passenger airbag OFF indicator illuminated
- SRS system fault stored
- Airbag may not deploy fully in a crash
Common Causes
- Faulty airbag inflator module
- Damaged wiring harness under dash
- Airbag control module failure
- Corroded connector at airbag module
Diagnostic Steps
- Scan SRS module for codes
- Inspect passenger airbag connector
- Measure circuit resistance
- Check wiring harness from module to airbag
- Verify airbag control module power and ground
Repair Notes
Professional airbag service required. Do not attempt DIY airbag repairs. Disconnect battery and wait 10 minutes before working near airbag components.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 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
- B0014Passenger Side Airbag Deployment Circuit Open
B0004 on Other Vehicles
Common Questions
What does code B0004 mean on a 1996-1999 BMW 318i E36?
B0004 stands for "Passenger Frontal Stage 2 Deployment Control". Malfunction in the passenger frontal airbag stage 2 deployment circuit. The stage 2 inflator provides additional inflation force during severe frontal collisions.
What are the symptoms of B0004 on a BMW 318i E36?
Common symptoms of B0004 include: Airbag warning light on, Passenger airbag OFF indicator illuminated, SRS system fault stored, Airbag may not deploy fully in a crash.
What causes B0004 on a 1996-1999 BMW 318i E36?
Common causes of B0004 include: Faulty airbag inflator module, Damaged wiring harness under dash, Airbag control module failure, Corroded connector at airbag module.