Airbag control unit with part number 285589073R

What does the airbag control unit 285589073R do?

As the central unit of the restraint system for Renault, the airbag control unit 285589073R controls airbags and seatbelt pretensioners. It evaluates the crash sensors, monitors the system without interruption and displays faults via the airbag warning light. After an accident, it stores crash data and locks itself.

Monitoring covers the entire path from the sensor to the ignition. Every component must work flawlessly during operation, otherwise the protection would have gaps.

Detected faults go into the fault memory and are available there for a diagnosis.

Why does the control unit 285589073R fail?

Causes of the 285589073R: a stored crash data record from an accident is the most common cause, even if no airbag has deployed. Ageing of the components, moisture and voltage spikes are also possible.

The crash data remains in the unit after the accident. A usual diagnostic tool cannot erase it, and that is exactly why faults occur even when the electronics are sound.

Other causes are:

• ageing of the electronics
• solder joints that are cold or cracked
• corrosion and moisture on plugs
• voltage dips or voltage spikes from the vehicle electrical system

How can you tell that the 285589073R is defective?

Signs on the 285589073R: the airbag warning light on the instrument cluster lights up permanently or intermittently. A fault message also appears on the instrument cluster, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may not deploy.

These signs point to a defect:

• Warning light on the instrument cluster on permanently or intermittently
• Fault message on the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be emptied

If any of these signs appears, a prompt inspection is advisable.

Which vehicles is the 285589073R fitted in?

The 285589073R is fitted in these vehicles: Renault Mégane III (2008-2016). The list below shows the allocation.

This part number belongs to the vehicles in the following list.

• Renault Mégane III (2008-2016)

Comparing the part number on the label of the removed unit with this page only ensures that you have the right unit. Have the fault memory read out beforehand: only the result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285581365R, 8200962388, 985105478R.

How does the repair of the 285589073R work?

Repair sequence for the 285589073R: first have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Finally, create a repair order online and send in the well-packed unit.

At Airbag24, the unit is examined on the test bench, defective components are replaced, stored crash data is erased and a function test is run. Afterwards, your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days. The order of the steps serves your safety. Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 285589073R get to Airbag24?

Shipping of the 285589073R: you send the control unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel. Pack the unit shock-proof.