Airbag control unit with part number 0 285 011 904

What is the function of the airbag control unit 0 285 011 904?

The Bosch airbag control unit 0 285 011 904 is the central control module for the restraint system in the Daihatsu Tanto L375 (model years 2007–2013). It processes signals from the connected crash sensors and, within milliseconds, determines whether to activate airbags and seatbelt pretensioners, ensuring occupant safety in the event of a collision.

As an electronic module, this control unit continuously monitors all components of the safety system. In case of a malfunction or after crash data has been stored, it illuminates the SRS warning light on the instrument panel, alerting the driver to take action.

The proper functioning of this device is critical, as it coordinates the life-saving restraint systems in an emergency. It ensures that the correct airbags deploy at precisely the right moment.

Why does the control unit 0 285 011 904 fail?

The most common cause of failure for the control unit 0 285 011 904 is the storage of crash data following a collision. This data locks the module and deactivates the airbag system, indicated by the SRS warning light. Other causes include internal electronic faults, corrosion, or mechanical damage to the circuit board.

After a collision—even minor ones—a permanent entry is recorded in the control unit’s memory. This “crash record” serves as a safety precaution, preventing reuse until the data is professionally erased (crash reset).

In addition to crash data storage, components on the circuit board—such as capacitors or other electronic parts—may fail due to age. Such internal defects also lead to system deactivation and require expert repair at the component level.

How do you recognize a defect in the airbag control unit?

A defect in the control unit 0 285 011 904 primarily manifests as a permanently illuminated airbag or SRS warning light on the instrument panel. Often, the fault code stored in the error memory—which indicates an internal fault or saved crash data—cannot be cleared using a diagnostic tool.

The most obvious symptom is the constantly lit warning light on the dashboard. It does not turn off after starting the vehicle, signaling a serious, safety‑related issue within the system.

During a workshop diagnosis, fault codes are read out that directly point to the control unit. Typical messages include “Internal control unit fault” or “Crash data stored.” These errors clearly indicate a defect within the module itself.

In which vehicles is the control unit 0 285 011 904 installed?

The Bosch airbag control unit with part number 0 285 011 904 is specifically designed for models of the Daihatsu brand. It is mainly used in the Daihatsu Tanto L375 series from model years 2007 to 2013. Airbag24 offers professional repair services for this specific model.

At Airbag24, we repair part number 0 285 011 904 for the following model:

Daihatsu Tanto L375 (2007–2013)

How is the control unit 0 285 011 904 professionally repaired?

Repair of the control unit 0 285 011 904 begins with proper removal, during which the battery must be disconnected. After sending the unopened original unit to Airbag24, it undergoes analysis; stored crash data is erased (crash reset), and defective electronic components are replaced with genuine parts. Two years' statutory liability for defects is provided on the repair.

Before removal, it is essential to disconnect the vehicle battery to prevent unintended activation or short circuits. The control unit is typically located in the center console or beneath one of the front seats. The yellow airbag connectors must be carefully detached without force.

At Airbag24, repairs follow a certified process: Following an initial inspection, crash data is securely deleted. Subsequently, all relevant components on the circuit board are examined and replaced with new original parts if necessary. Final tests confirm full functionality.