Airbag control unit with part number 285010555

What is the function of Airbag Control Unit 285010555?

The Bosch Airbag Control Unit 285010555 is the central control module for the passive safety systems in Peugeot 207 models. It processes signals from impact sensors, deploys airbags and seatbelt pretensioners in the event of a crash, and stores relevant crash data to lock the system after an incident.

As the “brain” of the restraint system, this component continuously monitors data from crash sensors distributed throughout the vehicle. Upon detecting a collision, it makes split-second decisions on which safety devices—such as the driver’s airbag, knee airbags, or pyrotechnic seatbelt pretensioners—should be activated to provide optimal occupant protection.

Manufactured by Bosch, this control unit is specifically designed for use in various versions of the Peugeot 207. It is essential for maintaining vehicle safety and ensuring proper operation of the entire airbag system.

Technically, part number 285010555 is compatible with or identical to other numbers, including references 0285010554, 9665699780, 9663593480, 285010112, 9661440680, 285001745, and 9666843880. Verifying these numbers ensures exact fitment.

Why does Control Unit 285010555 fail?

The most common cause of failure for Control Unit 285010555 is the storage of crash data following an accident, which triggers an internal lockout. Other defects arise from internal electronic faults on the circuit board, moisture damage caused by water ingress, or as a result of improper prior repair attempts.

After a crash involving deployed airbags or seatbelt pretensioners, the control unit stores so‑called crash data. This safety feature prevents further use of the vehicle without inspection and locks the device internally. Such a lock can only be released through specialized repair services.

Internal electronic failures are another widespread issue. Defective components on the circuit board, cold solder joints, or problems with the internal EEPROM memory can lead to total failure or malfunctions. These defects are hardware‑based and require component‑level repairs.

Since the control unit is installed in the center console area, spilled liquids or high humidity can cause moisture damage. Corrosion on the circuit board disrupts conductive traces, inevitably resulting in malfunctions.

How do you recognize a defect in 285010555?

A defective Airbag Control Unit 285010555 typically manifests as a permanently illuminated airbag warning light on the dashboard. Additionally, the fault memory often cannot be cleared, or communication between the diagnostic tool and the control unit breaks down, preventing accurate fault analysis.

The most obvious sign is the persistently lit airbag warning light. It does not turn off after starting the engine, indicating a serious fault in the safety system that may compromise the vehicle’s roadworthiness.

Another clear symptom is the lack of communication. When attempting to read the fault memory with a diagnostic tool, the system frequently reports “No communication with airbag control unit.” The control unit no longer responds to requests, making it undiagnosable by workshops.

Following a crash, the control unit remains locked—even if no explicit error codes appear. Stored crash data prevents restarting the system, and the warning light stays on. Attempts to clear the fault memory also fail.

Professional note: Before removal, have a workshop verify whether the fault truly lies with the control unit itself, rather than with wiring or sensors. Include the diagnostic report with your submission.

In which vehicles is 285010555 installed?

The Bosch Airbag Control Unit with part number 285010555 and its variants is specifically designed for various models within the Peugeot 207 series. At Airbag24, we repair this control unit for the sedan, GTI, and SW (station wagon) versions across their respective model years.

At Airbag24, we have successfully performed repairs on this control unit for the following models:

Peugeot 207 I (model years 2006–2009), as well as the facelifted version (model years 2009–2015)

Peugeot 207 GTI I

Peugeot 207 SW I (model years 2006–2009), along with the facelifted version (model years 2009–2015)

Given the wide variety of variants, it is crucial to verify the part number printed directly on the control unit before submitting a repair request to ensure correct identification.

Is it worth repairing control unit 285010555?

Yes, repairing control unit 285010555 is a highly cost-effective alternative to an expensive new purchase. You often save significantly compared to a new part, which manufacturers frequently list at over €500, and you receive a fully functional component with 2 years’ statutory liability for defects.

The biggest advantage is the substantial cost savings—up to 70% compared to a new part. Instead of a large investment in a brand-new component, your existing hardware is professionally refurbished.

An additional key benefit is preserving your vehicle’s original configuration. Since your own control unit is repaired, no extra coding or programming work is required at the workshop—tasks that are often necessary when replacing the unit.

Repairing also represents a sustainable solution. It helps avoid electronic waste and conserves resources that would otherwise be used to manufacture a new control unit. We provide 2 years' statutory liability for defects on every repair performed.

How does the repair process work at Airbag24?

After professional removal and shipment of your control unit to Airbag24, our technicians conduct a thorough diagnosis. The repair includes fixing internal electronic faults and erasing crash data. Finally, the unit is tested and returned to you with 2 years’ statutory liability for defects.

The process begins with removing the control unit, located in the Peugeot 207 beneath the center console near the gearshift lever. Important: Before removal, always disconnect the battery’s positive terminal. Then, securely package the component for transport.

Upon arrival at Airbag24, the unit undergoes a professional incoming inspection to verify the reported fault. Our specialized technicians then carry out the actual repair, which involves clearing crash data and restoring the electronics on the circuit board.

Following successful repair, each control unit undergoes comprehensive functional testing to ensure it operates flawlessly and meets the specifications of a new part. Only after this rigorous check is it approved for return shipping.