What Is the Peugeot Bipper Airbag ECU?

 For some vehicles (especially those that sit unused), a weak or flat battery can allow the airbag ECU to record a fault that looks like a real failure. In some cases this is just algorithm corruption, not physical damage — meaning a reset may clear the code.

Because this fault is inside the airbag ECU, a regular peugeot Bipper Airbag ECU B0100-49 Repair

 mechanic can’t fix it simply by replacing a sensor or clearing a code. The typical repair process involves:

Diagnostic Confirmation: A scan tool confirms the code B0100-49 is present and isolates it to the ECU.

Remove the ECU: The airbag ECU module is physically removed from the vehicle.

Professional Repair or Rebuild:

The unit is opened and tested in a specialist bench setup.

Technicians repair or replace faulty internal components or reset corrupted memory.

The internal electronics are restored so that the module functions correctly again.

Testing: After repair, the ECU is tested to make sure it communicates properly and the airbag warning light stays off.


Return and Re-installation: The repaired unit is sent back and installed — in most cases no re-programming is needed.


Many specialist workshops offer this service because replacing the entire module is much more expensive and often requires dealer programming. The repair typically costs a fraction of a new unit and can often be done with a fast turnaround (sometimes even same-day).


Why Not Just Replace the ECU?


Airbag ECUs are tightly integrated with safety systems; replacing them often requires dealer-level tools and programming to match the vehicle’s VIN and crash data. A specialist repair service keeps your original ECU, restores its functionality, and avoids expensive replacement and coding.

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