B0052
Driver Seat Belt Pretensioner Circuit Open
2019-2024 BMW 3 Series G20 2.0L I4 Turbo B48
Critical SeverityBodyGeneric (SAE)
Description
An open circuit detected in the driver seat belt pretensioner deployment loop.
Symptoms
- Airbag/seatbelt warning light on
- SRS fault stored
- Pretensioner will not activate in crash
- No driving symptoms
Common Causes
- Disconnected pretensioner connector
- Broken wire in B-pillar
- Faulty pretensioner squib
- Seat belt assembly replaced without proper reconnection
Diagnostic Steps
- Scan SRS codes
- Inspect pretensioner connector at B-pillar base
- Check wiring continuity
- Measure deployment loop resistance
Repair Notes
Reconnect pretensioner or repair wiring. Replace seat belt assembly if pretensioner is faulty.
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
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0009Rear Center Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
B0052 on Other Vehicles
Common Questions
What does code B0052 mean on a 2019-2024 BMW 3 Series G20?
B0052 stands for "Driver Seat Belt Pretensioner Circuit Open". An open circuit detected in the driver seat belt pretensioner deployment loop.
What are the symptoms of B0052 on a BMW 3 Series G20?
Common symptoms of B0052 include: Airbag/seatbelt warning light on, SRS fault stored, Pretensioner will not activate in crash, No driving symptoms.
What causes B0052 on a 2019-2024 BMW 3 Series G20?
Common causes of B0052 include: Disconnected pretensioner connector, Broken wire in B-pillar, Faulty pretensioner squib, Seat belt assembly replaced without proper reconnection.