Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Central Airbag Trigger Module (ZAE & ZAE II): Notes
Model: E31, E34, E36, E36/7, E38
Production Date: E31: from 9/93 to production end
E34: from 9/93 to production end
E36/7: from start of production to 8/97
E36: from 9/93 to 12/96
E38: from start of production to 8/96
E39: from start of production to 8/96
Central "Airbag" Trigger Module (ZAE)
The ZAE passive safety system preceded the MRS systems. It was introduced for the 1994 Model Year vehicles including:
- E31 - all models.
- E34 - all models.
- E36 - all models.
The ZAE was enhanced with added features for the E38 in model year 1995.
The ZAE system consists of the following components:
- ZAE control module.
- Driver's airbag.
- Passenger's front airbag.
- SRS warning lamp.
- Pyrotechnic seat belt tensioners (with E38).
- Seat belt switch contacts (with E38).
- Passenger's seat occupancy sensor (with E38).
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.