Airbag control unit with part number 0 285 015 304

What is the function of Airbag Control Unit 0 285 015 304?

The Bosch Airbag Control Unit with part number 0 285 015 304 is the central control unit for the Supplemental Restraint System (SRS) in the Nissan Navara D23. Its primary task is to evaluate signals from crash sensors and, in the event of an accident, activate life-saving restraint systems such as airbags and seatbelt pretensioners.

As a core component of the passive safety system, it continuously monitors all connected sensors and actuators. Its main function is the rapid and reliable activation of protective mechanisms to provide optimal occupant protection during a collision.

In addition, the control unit features internal memory that stores so‑called crash data after an accident. This data retention serves to document the accident sequence and results in a functional lockout of the device.

Why does Airbag Control Unit 0 285 015 304 fail?

The most common cause of failure for control unit 0 285 015 304 is the storage of crash data following an accident in which airbags or seatbelt pretensioners were deployed. Other causes include internal electronic faults, such as an open circuit in an airbag ignition circuit, or external factors like moisture damage and defective connectors.

After a collision, the control unit deliberately locks itself to prevent further use of a potentially compromised system. This condition is often diagnosed as an “internal error” and cannot be reset using standard workshop diagnostic tools.

A specific fault code well-known in workshop practice is B1049, indicating an open circuit in the driver’s airbag ignition circuit. Such internal errors can occur even without an accident and require chip‑level repair.

Occasionally, broken wiring or corroded connectors in the vehicle’s wiring harness can also impair the control unit’s functionality. Therefore, a thorough diagnosis at a specialized workshop is essential to clearly identify the root cause.

For the Nissan Navara or Frontier, alternative part numbers such as 98820 5XA0A or 988205XA0A exist; these offer similar functions and may exhibit comparable defects.

How do you recognize a defect in Control Unit 0 285 015 304?

A defective Airbag Control Unit 0 285 015 304 typically manifests as a permanently illuminated or intermittently flashing airbag warning light on the instrument cluster. Additional clear indicators include the inability to erase fault codes or a complete lack of communication with the diagnostic tool.

The most obvious symptom is the persistently lit SRS warning light, signaling to the driver that the restraint system is not operational and may fail to deploy in the event of an accident.

Another clear sign of a defect within the control unit itself is when the workshop’s diagnostic tester cannot establish communication with the module. The unit no longer responds to queries, often due to an internal error or a lockout caused by stored crash data.

Even if communication is possible, the entry in the fault memory—“internal error” or “crash event stored”—cannot be cleared. This is a sure indication that specialized repair is required.

It is recommended to have the control unit inspected at a specialist workshop before removal to confirm whether the fault truly lies within the device itself. This helps avoid unnecessary expenses should the issue instead originate from a sensor or the wiring harness.

In which vehicles is Control Unit 0 285 015 304 installed?

The Bosch Airbag Control Unit with part number 0 285 015 304 is primarily used in the Nissan Navara D23 series, covering both pre‑facelift and post‑facelift models produced from 2015 onward. Airbag24 offers professional repair services specifically tailored to these vehicles.

At Airbag24, we repair part number 0 285 015 304 for the following models:

Nissan Navara D23 (2015–2020)

Nissan Navara D23 Facelift (from 2020 onward)

How does the repair of Control Unit 0 285 015 304 proceed?

Repair at Airbag24 begins with the secure shipment of the removed control unit. Our technicians perform a detailed analysis, erase stored crash data, and resolve internal electronic faults through reprogramming. Following a final test, the unit is returned with 2 years' statutory liability for defects.

After a professional diagnosis at your workshop and removal of the unit, please pack it securely for transport and send it to Airbag24. Include a brief description of the fault to expedite the process.

At our technical center, we begin with an initial diagnostic test to verify the reported fault. Subsequently, using specialized tools, we erase the crash data from the control unit’s internal memory and reprogram the electronics to restore the original functionality.

Following successful repair, the control unit undergoes a comprehensive functional test. We provide 2 years' statutory liability for defects on all repairs.

After reinstalling the unit in the vehicle, a qualified workshop must verify the proper operation of the entire SRS system. This ensures that all components work seamlessly together and that full protective functionality is guaranteed.