Fault Code B0021
Code meaning, symptoms, possible causes, part number, and estimated cost.
B0021
Seat Belt Pretensioner - Passenger Side
This DTC indicates an issue with the passenger side seat belt pretensioner. These pretensioners are responsible for rapidly tightening the seat belt during a collision, thus protecting the occupant. This fault can significantly reduce belt effectiveness. Repair at a qualified garage is required.
Part Details
Part Name
Seat Belt Pretensioner - Passenger Side
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪600 - ₪1800
Engine Location
Seat belt buckle or reel on the passenger's seat
Symptoms
- SRS/Airbag warning light on
- Seat belt feels looser than usual
- Unusual noise from pretensioner area
- DTC stored in ECU memory
Possible Causes
- 1Internal pretensioner fault (mechanical or pyrotechnic)
- 2Damaged wiring or short circuit to pretensioner
- 3Loose or disconnected connector
- 4Previous accident that deployed the pretensioner
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