93AB

What the Code Means

93AB logs excessively high resistance in the driver airbag circuit, stage 1. The airbag module continuously measures the resistance of the igniter circuit, and any deviation from spec blocks deployment: the system reads an open or poor contact as an inability to guarantee deployment.

Typical causes are a faulty clock spring behind the steering wheel, damaged wiring, or poor connections at the connectors. The airbag module itself is not serviceable and must be replaced once a fault is confirmed.

Symptoms

• Airbag warning light is on
• The driver airbag may not deploy in a crash

Diagnosis and Repair

1. Inspect the clock spring and circuit wiring for damage.
2. Replace the clock spring if a fault is found.
3. If the module fault is confirmed, replace the driver airbag with a BMW OEM part (the module is not repairable).
4. Clear the codes and run a system check.

Secondary Damage

• If the code is ignored, the airbag may not deploy in a crash, raising the risk of injury
• A faulty clock spring can cause problems with the steering wheel controls