The SRS/airbag control module has detected a low-voltage or open-circuit fault in the left front side-impact sensor, which helps trigger side airbags and seat-belt pretensioners during a side collision.
SeverityCritical
CategoryAirbag / SRS
Est. Repair Cost$200–$700
Code TypeBody
DIY RepairProfessional
⚡ Common Causes
›Failed side impact sensor
›Wiring damage from accident
›Corroded connector
⚠️ Symptoms
›Airbag warning light on
✅ How to Fix — Step by Step
Step 1:Scan with SRS tool
Step 2:Inspect sensor wiring
Step 3:Replace side impact sensor
💡 Pro Tip: Treat any side-impact sensor code seriously after a collision — even a minor parking-lot bump can trip the sensor's internal fault flag, and it must be verified before the SRS system is considered safe.
Repair Cost Estimate
Full Repair Estimate
$200–$700
DIY Possible?
PRO
Severity
Critical
Frequently Asked Questions
What does OBD2 code B0051 mean?+
B0051 stands for Side Impact Sensor Left Front — Circuit Low. The SRS/airbag control module has detected a low-voltage or open-circuit fault in the left front side-impact sensor, which helps trigger side airbags and seat-belt pretensioners during a side collision.
What causes code B0051?+
Failed side impact sensor; Wiring damage from accident; Corroded connector
How do I fix code B0051?+
Scan with SRS tool; Inspect sensor wiring; Replace side impact sensor
How much does it cost to fix B0051?+
Estimated repair cost for B0051 is $200–$700.
Is B0051 DIY-friendly?+
B0051 typically requires professional equipment and a qualified mechanic.
