Airbag control unit with part number 285012924

What is the function of Airbag Control Unit 285012924?

The part number 285012924, also listed as 0285012924, refers to a central airbag control unit (SRS ECU) for various Peugeot 208 and 2008 models. As the core component of the passive safety system, it continuously monitors signals from crash sensors and determines, within milliseconds, whether to deploy airbags and seatbelt pretensioners.

This control unit serves as the overarching authority for the entire occupant restraint system. It communicates via the CAN bus with other vehicle control units to ensure context‑dependent, precise deployment. It processes data from acceleration sensors, seat occupancy mats, and seatbelt buckle switches to activate the appropriate restraint devices in the event of a crash.

In repair databases, vehicles equipped with control unit 285012924 are sometimes also listed under related part numbers such as 9810363180 or 9812713380. Therefore, carefully verifying the number stamped on the used unit is essential for accurate identification.

Why does control unit 285012924 fail?

Failure of control unit 285012924 is often caused by stored crash data following an accident, which locks the device and prevents reuse. Additionally, internal electronic faults are a common cause, such as issues with SMD components, power supply problems, or errors in CAN‑bus communication.

The most frequent reason for malfunction is the persistent storage of crash event data. After an airbag deployment, the control unit enters a “crash‑lock” state. This condition isn’t a typical defect but requires professional data reset to restore functionality.

Electronic failures on the circuit board are also widespread. These include defective SMD components like voltage regulators, capacitors, transistors, or MOSFETs that fail due to aging or voltage spikes. The CAN transceiver chip responsible for communication may also be affected.

External factors such as moisture can lead to corrosion at solder joints, traces, or connector contacts, resulting in internal short circuits or broken signal paths that disable the entire system.

How do you recognize a faulty airbag control unit 285012924?

A defect in control unit 285012924 is primarily indicated by the airbag warning light remaining constantly illuminated or flashing intermittently on the dashboard. Another clear sign is when a diagnostic tool cannot establish communication with the control unit or specific internal fault codes such as B1000 are detected.

The most obvious symptom for the driver is the active airbag warning light after starting the engine, signaling a safety‑system error that may originate directly from the control unit itself.

In the workshop, a failure often manifests as a failed diagnostic test: the control unit no longer responds to queries from the tester via the OBD interface, pointing to a serious internal fault or issues with the power supply or CAN bus.

If fault codes reveal an “internal control unit error,” undervoltage, or stored crash data, the root cause is highly likely to lie within the unit itself rather than in external components like sensors or wiring.

In which vehicles is control unit 285012924 installed?

Airbag control unit 285012924 is fitted in various models and generations of Peugeot. The focus here is on the popular Peugeot 208 and Peugeot 2008 series, including their facelifted and electric variants. At Airbag24, we repair this control unit for the specific models listed below.

At Airbag24, repairs for the control unit with part number 285012924 are available for the following vehicles:

Peugeot: 208 I (2012–2015) and facelift (2015–2019), 208 II (2019–2023) and facelift (from 2023), 2008 I (2013–2016) and facelift (2016–2019), e‑208 II, and 208 GTI I.

To ensure compatibility, it is imperative to verify that the part number printed on the control unit’s label matches the number 285012924 listed here. Only this way can incorrect orders be avoided.

How is control unit 285012924 repaired?

The repair process at Airbag24 begins with the submission of the removed control unit along with a detailed description of the fault. Our technicians perform a thorough analysis, fix electronic defects at the component level, or reset crash data. Upon successful restoration and testing, the unit is returned to you with 2 years' statutory liability for defects.

Before removal, the vehicle’s fault memory should be read out and the shipment protocol attached. This helps our technicians with diagnosis. The control unit must be securely packaged and shipped with protection against electrostatic discharge.

Upon arrival at Airbag24, the control unit undergoes an incoming inspection. Depending on the fault pattern, stored crash data is erased in compliance with legal requirements, defective electronic components such as capacitors or processors are replaced, and cold solder joints are re-soldered. For irreparable damage, such as that caused by severe water exposure, we often offer fully overhauled replacement units.

After repair, the unit is tested on a test bench to ensure proper functionality of all systems. In some cases, after reinstallation in the vehicle, it may be necessary to re‑code the control unit or adapt it to the vehicle configuration.