Airbag control unit with part number 624926000

What is the function of Airbag Control Unit 624926000?

The airbag control unit with part number 624926000 serves as the central control module for the occupant protection system in various Peugeot 308 models. It processes signals from crash sensors, deploys airbags and seatbelt pretensioners in the event of a collision, and permanently stores relevant crash data in its internal memory to prevent re‑deployment.

As an OEM component from Peugeot, this control unit acts as the brain of the entire restraint system. Its primary task is continuous monitoring of all connected components, including impact sensors, seat occupancy mats, seatbelt pretensioners, and the airbag modules themselves. In the event of a collision, the electronics determine within milliseconds which safety systems need to be activated.

A critical function is the irreversible storage of crash data after an accident. This lock ensures safety by guaranteeing that the system is professionally inspected and reset following an incident. The unit is functionally identical to alternative part numbers such as 9673578380 (Valeo), 9652712380, 9674291480, and 9665100080.

Why does Control Unit 624926000 fail?

The most common cause of failure for Control Unit 624926000 is the retention of crash data after an accident, which cannot be cleared using standard diagnostic tools. Other defects include internal communication errors (e.g., error code 65535) and electronic faults in components requiring chip‑level repair.

The primary reason for malfunction is the system‑wide lock imposed after a collision. Even minor accidents where no airbags deploy—such as a slight rear‑end impact—can trigger seatbelt pretensioners, leading to permanent crash data storage. This activates the airbag warning light and locks the unit from further operation.

Another frequent issue is complete loss of communication. In such cases, the control unit becomes inaccessible via the OBD2 interface, often indicated by error code 65535 (“control unit defective”) in the fault memory of other system components. The root cause is usually an internal hardware defect.

Rarely, electronic components on the circuit board may fail due to overvoltage or aging, necessitating detailed analysis and replacement of affected parts. Software or coding issues are also possible but typically correlate with underlying hardware failures.

How do you recognize a fault in 624926000?

A defect in Airbag Control Unit 624926000 primarily manifests as a continuously illuminated or flashing airbag warning light on the instrument cluster. Additionally, it often becomes impossible to access the unit via a diagnostic tool or clear fault codes, indicating either an internal fault or stored crash data.

The clearest symptom is the active airbag warning light, which remains on immediately after ignition or illuminates during driving. This signals a critical fault in the restraint system that requires immediate inspection.

An additional clear sign is total loss of communication. When a specialist workshop attempts to read the fault memory, they receive no response from the airbag control unit, effectively rendering it invisible to vehicle diagnostics.

Additional symptoms may include secondary malfunctions, such as the engine check light flashing or errors related to seatbelt pretensioners or seat adjustments. The latter often points to wiring problems beneath the seats—such as broken cables—which should be checked first.

In which models is 624926000 installed?

The airbag control unit with part number 624926000 is primarily fitted across various generations and body styles of the Peugeot 308. At Airbag24, we professionally refurbish this control unit for models ranging from the first to the third generation, including facelifts, SW, CC, and GTI versions.

At Airbag24, we repair Control Unit 624926000 for the following Peugeot models:

Peugeot 308 I (2007–2011) and I Facelift (2011–2015)

Peugeot 308 II (2013–2017) and II Facelift (2017–2021)

Peugeot 308 III (from 2021) and III Facelift (from 2025)

Peugeot e-308 III

Peugeot 308 GTI I, GTI II, and GTI III

Peugeot 308 SW I (2007–2011) and I Facelift (2011–2015)

Peugeot 308 CC I (2007–2011) and I Facelift (2011–2015)

How is Control Unit 624926000 professionally repaired?

Professional repair of Control Unit 624926000 at Airbag24 includes diagnosing transmitted fault logs, erasing permanently stored crash data using specialized software, and replacing defective electronic components. The unit is then thoroughly tested and reset to restore full functionality.

After submission to Airbag24, the repair follows a proven process. First, an initial inspection is carried out based on the fault logs provided by the customer. It is crucial that a diagnosis be performed at a specialized workshop before removal, in order to rule out external sources of failure such as cable breaks.

The core of the repair is resetting the internal memory. Stored crash data is completely erased using specialized equipment, restoring the control unit to its factory‑original condition. If an electronic defect is present, the damaged components on the circuit board are identified and replaced with new, high‑quality parts.

Following hardware repair, all internal fault codes are cleared, and the original vehicle coding is verified to ensure a plug‑and‑play installation. Finally, a functional test is conducted before the device is securely packaged and returned to the customer. We provide 2 years' statutory liability for defects on all repairs.

What are the benefits of repair?

The primary advantage of repairing airbag control unit 624926000 is significant cost savings compared to purchasing an expensive new part directly from the manufacturer. Additionally, there is no need for time‑consuming re‑coding, as the repaired unit retains its vehicle‑specific configuration and is immediately ready for use.

Repair is not only economically sensible but also technically superior. A new part often requires extensive programming and coding tailored to the specific vehicle, incurring additional workshop costs. In contrast, the refurbished original control unit keeps its existing coding and can simply be reinstalled (plug‑and‑play).

Moreover, repair represents a sustainable alternative. Rather than discarding a complex electronic component, only the defective parts are replaced, conserving valuable resources and contributing to environmental protection. With 2 years’ statutory liability for defects, the repair also offers peace of mind and reliability.