B0005critical severityBody
Driver Knee Airbag Deployment Circuit
on 2021 Mazda MX-5 Miata 2.0L I4 · RWD
What this code means
Malfunction detected in the driver knee airbag deployment circuit. The knee airbag protects the driver lower extremities in frontal collisions.
Symptoms
- Airbag warning light on
- SRS fault code stored
- Knee airbag may not deploy in crash
- No visible symptoms during normal driving
Common causes
- Faulty knee airbag module
- Wiring damage under dashboard
- Airbag control module fault
- Connector corrosion at knee airbag
Diagnostic steps
- Scan SRS codes
- Inspect knee airbag connector under dash
- Measure deployment loop resistance
- Check wiring from ACM to knee airbag
- Test airbag control module outputs
Repair notes
Replace knee airbag module or repair wiring. Professional service required.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0006
Passenger Knee Airbag Deployment Circuit
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0009
Rear Center Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open