Airbag control unit with part number 550579000

What is the function of Airbag Control Unit 550579000?

The airbag control unit with part number 550579000 serves as the central control module for the passive safety system (SRS) in certain Peugeot 106 models. Its primary task is to process sensor data to ensure precise and timely deployment of airbags and seatbelt pretensioners in the event of a crash.

As the “brain” of the restraint system, this module continuously monitors all connected components, such as impact sensors, airbag modules, and seatbelt pretensioners, ensuring that the entire system remains fully operational at all times.

If the control unit detects a fault in one of these components or in its own internal electronics, it illuminates the airbag warning light on the instrument panel. This alerts the driver to a malfunction and indicates the need for a workshop inspection.

Why does control unit 550579000 fail?

The most common cause of failure for control unit 550579000 is the storage of crash data after an accident, which locks the module. Other reasons include internal electronic malfunctions leading to complete communication loss, or the setting of an internal error code that cannot be cleared.

Following a collision in which the airbags have deployed, the unit permanently writes crash data into its memory. This is a manufacturer‑imposed safety measure designed to prevent reuse without professional diagnosis and repair.

Even without an accident, defects can occur. Often, these involve communication issues where the control unit becomes inaccessible to diagnostic tools. The root cause is frequently faulty components on the module’s circuit board.

Another typical issue is the setting of an internal error code. Such a code indicates a problem within the control unit itself and cannot be erased using standard workshop scanners, necessitating either repair or replacement.

How do you recognize a defect in control unit 550579000?

A defect in control unit 550579000 primarily manifests as a persistently illuminated airbag warning light on the dashboard. Another clear symptom is when the warning light only turns on about 30 seconds after the engine starts, or when the control unit becomes completely unresponsive via the diagnostic port.

The most obvious sign is the airbag warning light that remains on after starting the vehicle, indicating a serious malfunction in the safety system that could compromise its functionality in an emergency.

In some cases, the warning light may illuminate with a delay of approximately 30 seconds after the engine starts. This specific behavior often points to an internal fault identified during the unit’s self‑diagnostic routine.

A more critical indication for the workshop is the absence of communication: if a scan tool cannot establish a connection to the SRS module, diagnosing the fault becomes impossible, raising suspicion of total failure of the control unit.

In which Peugeot models is 550579000 installed?

The airbag control unit with part number 550579000 is specifically designed for various versions of the Peugeot 106. It is used in both first- and second‑generation vehicles, as well as in specialized variants such as the Rallye I and the Van I.

At Airbag24, we professionally repair control unit 550579000 for the following Peugeot models:

Peugeot 106 S1 (1991–1996), Peugeot 106 S2 (1996–2003), Peugeot 106 Rallye I, and Peugeot 106 Van I.

How is control unit 550579000 repaired?

The repair process begins with removing the defective unit and securely shipping it to our facility. At our specialized workshop, stored crash data is erased, internal faults are corrected, and the original Vehicle Identification Number (VIN) is preserved. Following successful restoration and testing, the module can be reinstalled without requiring re‑coding.

After sending the unit to Airbag24, the repair follows a proven procedure. The removed control unit undergoes an initial inspection to verify reported faults and read out specific error codes.

The core repair involves professionally erasing the stored crash data that locks the unit after an accident. Additionally, known weak points and defective electronic components on the circuit board are identified and replaced.

A key advantage of this repair method is that the original Vehicle Identification Number (VIN) embedded in the control unit remains intact, eliminating the need for time‑consuming and costly re‑coding or programming at the workshop.

Finally, each repaired control unit undergoes a functional test to confirm flawless operation. Two years' statutory liability for defects is provided on all work performed.

Is it Worth Repairing Control Unit 550579000?

Repairing control unit 550579000 is highly cost-effective. Compared to a new part, which can range from 750 to 800 euros depending on the supplier, refurbishment delivers substantial savings. Additionally, the repaired unit is immediately ready for use, as no re‑coding is required.

The primary advantage lies in the financial savings. The cost of a brand‑new control unit far exceeds that of professional repair, making repair the preferred solution for workshops and vehicle owners alike.

Since the original vehicle configuration—especially the VIN—is preserved within the unit, the refurbished module is “plug-and-play.” It simply gets reinstalled and reconnected in its original location, without any additional programming work.

Repair is not only economical but also sustainable. Rather than discarding a complex electronic component, it is expertly refurbished. 2 years’ statutory liability for defects on the repair provides added peace of mind.