B0071
First Row Center Seatbelt Pretensioner Deployment Control
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Code B0071 indicates a fault in the first row center seatbelt pretensioner deployment control circuit. The center front seatbelt pretensioner is designed to rapidly tighten the belt against the center-seat occupant during a collision, removing slack and securing the person in position before airbags deploy. This is especially important for the center seating position, which lacks a dedicated frontal airbag and relies more heavily on the seatbelt for crash protection.
When this code is set, the center seatbelt will continue to function normally for everyday use — it will buckle, unbuckle, and lock during hard braking just as expected. However, the pyrotechnic pretensioner that fires during a crash will be disabled, meaning the belt will not actively tighten at the moment of impact. This reduces the effectiveness of the restraint system for the center-seat occupant.
Diagnosis requires an SRS-capable scan tool to identify the specific sub-fault (open circuit, short to ground, resistance out of range, etc.). The center seatbelt pretensioner wiring is often routed through areas that see frequent activity — under center consoles, between seats, or along the floor where spills and debris accumulate. Connectors in these areas should be inspected for corrosion and damage. As with all SRS components, repairs should follow proper safety procedures including battery disconnection and capacitor discharge time.
Severity
Symptoms
- •Airbag or SRS warning light illuminated on the dashboard
- •Seatbelt warning indicator may behave abnormally for the center seating position
- •Warning chime at vehicle startup related to restraint system
- •No change in seatbelt function during normal driving — the pretensioner may not fire in a crash
- •Center front seatbelt may appear to function normally but lacks crash-responsive tightening
Likely Causes
The center seatbelt pretensioner wiring is routed through the floor console or under the front bench seat. This area is exposed to dirt, spills, and physical damage from items stored under or between the seats.
The pretensioner contains a pyrotechnic squib that must maintain a specific resistance. Over time, especially in vehicles with high mileage or exposure to humidity, the squib can degrade and produce out-of-range resistance readings.
The SRS controller monitors the center pretensioner deployment loop. An internal monitoring circuit failure, power supply issue, or corrupted calibration can cause a false fault on this loop.
The buckle assembly for the center seatbelt position includes electrical connections for the pretensioner. Physical damage to the buckle, or a connector loosened by center console service work, can disrupt the deployment loop.
Estimated Cost
Professional Repair
Includes parts + labor
Common Fixes
- Inspect and repair wiring and connectors for the center seatbelt pretensioner
- Replace the center seatbelt pretensioner assembly
- Clean or replace corroded connectors under the center console or seat
- Replace the airbag control module if an internal fault is confirmed