B0021Left Side Deployment Stage 1 Control
The SRS module has detected a fault in the deployment control circuit for the left side (driver) airbag stage 1. Side impact protection on the driver side may be reduced.
Can I keep driving? Yes
You can keep driving normally. Schedule a check soon so emissions and performance are not affected.
Sistema Afectado
Carrocería · Confort y seguridad (SRS)
Corresponde a la carrocería: airbags (SRS), climatización, cierre centralizado o iluminación.
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Symptoms You Will Notice
What you may observe when this code appears
- Warning light or symbol related to the affected system Comfort or safety function impaired
Possible Causes
The components or conditions that trigger this code
- 1Loose airbag connector under driver seat Wiring pinched in seat rail Side airbag module internal fault
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: hard. Estimated time: 0.8-3 hours. Estimated cost: €150-€
- 2Professional repair recommended
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
SRS / body modules
* Diagnosis only: $50–$150
Quick Info
Dig Deeper
Videos, images and service manuals
Have Another Code?
Look it up directly: