SRS Airbag Reset Tool B800 for BMW Model E36 E46 E34 E38 E39 Z3 Z4 X5

The SRS Airbag Reset Tool B800 is a specialized diagnostic device designed to read and clear Supplemental Restraint System (SRS) fault codes in BMW vehicles manufactured between 1994 and 2003.

Compatible BMW Models
The B800 is compatible with all variants of the following models within the 1994–2003 timeframe:
3 Series: E36, E46 (Note: Known compatibility issues exist with the 2001 BMW 330i).
5 Series: E34, E39.
7 Series: E38.
Z Series: Z3, Z4.
X Series: X5, X3.
Key Functions
Fault Code Reading: Displays SRS fault codes to help identify specific issues, such as faulty seat occupancy sensors or disconnected airbags.
SRS Light Reset: Clears the “SRS” or airbag warning light from the dashboard within seconds after the underlying issue is resolved.
Live Data: Some versions can display live sensor data to help diagnose intermittent malfunctions.

How to Use the B800
Connection: Connect the tool to the vehicle’s diagnostic port. For older models (like E36), this is often a 20-pin port located under the hood. For newer models, use the OBDII port under the dashboard.
Ignition: Turn the ignition key to the “ON” position, but do not start the engine.
Read Codes (FA Mode): The tool typically starts in “FA” mode. Press ENTER to view the code chart number, then press it again to see specific fault codes.
Clear Codes (CA Mode): Use the SCROLL button to select “CA” (Clear Airbag) and press ENTER to reset the light.
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Common Troubleshooting
“Flashing E” Message: This indicates a communication error. Try plugging in the tool before turning on the ignition, or ensure the connector is fully seated.
Light Returns: If the SRS light comes back on immediately after resetting, a persistent hardware fault still exists (e.g., a broken sensor) that must be repaired before the code can be permanently cleared.
These product listings detail the compatibility, functions, and usage of the SRS Airbag Reset Tool B800 for specific BMW models.