Airbag control unit with part number 285001745

What is the function of Airbag Control Unit 285001745?

The airbag control unit with part number 285001745 is the central control module for the Passenger Restraint System (SRS) in the Peugeot 207 I. It processes signals from acceleration and crash sensors to precisely and timely deploy airbags and seatbelt pretensioners in the event of a collision, thereby protecting vehicle occupants.

As the brain of the passive safety system, this module continuously monitors all connected components. It analyzes sensor data to determine the severity and nature of an impact. Based on this analysis, the control unit decides which restraint devices—such as front or side airbags—need to be activated.

Manufactured by suppliers like Bosch, the unit ensures the proper functioning of the entire airbag system. Any system fault is immediately detected and signaled to the driver via the SRS warning light in the instrument cluster.

Why does Control Unit 285001745 fail?

A failure of Control Unit 285001745 is most commonly caused by stored crash data following an accident, which locks the device. Other causes include internal electronic component defects, water damage leading to corrosion, or issues with wiring and connectors.

After an airbag deployment, the control unit stores non-erasable crash data. This manufacturer‑implemented security measure locks the unit, necessitating replacement or professional repair. It involves a hardware‑level lock within the internal memory.

Electronic malfunctions are another frequent source of failure. Defects in individual circuit board components, such as capacitors or processors, can result in total failure or erratic behavior. External factors like water ingress may also cause short circuits and irreparable damage to the electronics.

Rarely, but still possible, are physical damages to connectors or broken wires that disrupt communication between the control unit and sensors or airbags.

It’s important to note that this control unit is also known under comparison numbers 9663593480, 9665699780, and 9661440680, which are installed in the same vehicle models and may exhibit similar fault patterns.

How do you recognize a defect in Control Unit 285001745?

A defect in Control Unit 285001745 typically manifests as a permanently illuminated or flashing SRS airbag warning light in the cockpit. Often, a diagnostic tool cannot establish communication with the control unit, complicating fault diagnosis. In such cases, the entire airbag system is disabled.

The most noticeable symptom is the active airbag warning light, which fails to extinguish after starting the vehicle, signaling a critical fault in the restraint system. This clearly indicates that occupant safety is no longer guaranteed and requires immediate inspection at a specialized workshop.

Another typical sign is complete loss of communication. Workshops discover during diagnostics that the control unit is no longer responsive via the OBD interface. Error messages such as “No communication with airbag control unit” confirm this condition.

The most severe consequence of a defect is the full deactivation of passive safety systems. In the event of a crash, neither airbags nor seatbelt pretensioners will deploy, significantly increasing the risk of injury to occupants.

In which vehicles is Control Unit 285001745 installed?

The airbag control unit with part number 285001745 is specifically designed for the first generation of the Peugeot 207. It is used in both the original models from 2006 to 2009 and in the facelifted versions from 2009 to 2015.

At Airbag24, professional repair services for Control Unit 285001745 are available for the following models:

Peugeot 207 I (model years 2006–2009)

Peugeot 207 I Facelift (model years 2009–2015)

How is Control Unit 285001745 repaired?

Professional repair of Control Unit 285001745 follows a structured process. Following an initial assessment, depending on the root cause of the fault, stored crash data is erased at the hardware level, or defective electronic components on the circuit board are replaced. A final functional test ensures full operational readiness.

Upon submission to Airbag24, the control unit undergoes a comprehensive diagnostic procedure. During this process, stored fault codes are read out, and the exact cause of the defect—whether it’s a crash‑data lock or a hardware issue—is precisely identified.

In the next step, the actual repair takes place. Specialized technicians erase the crash data directly from the control unit’s memory chip using specialized programming tools. If an electronic fault is present, defective components such as capacitors or circuit board parts are carefully desoldered and replaced with new, high-quality spare parts.

Subsequently, the repaired unit undergoes a thorough quality and functional inspection to ensure it operates flawlessly once again. Two years' statutory liability for defects is provided for the completed repair.