Airbag control unit with part number 285583405R

What does the airbag control unit 285583405R do?

The airbag control unit 285583405R is the central control unit of the restraint system (SRS) for Renault. It processes the signals from the crash sensors and decides within a fraction of a second in the event of an accident which airbags and seatbelt pretensioners are triggered. It monitors the system continuously and reports faults via the airbag warning light.

Monitoring takes place not only at the moment of an accident but throughout operation. After an accident, the unit stores crash data and locks itself.

Why does the control unit 285583405R fail?

Most often the cause is crash data stored after an accident, even if no airbag has been triggered. Other causes can be aged components, cold solder joints, moisture, corrosion at plug connections and voltage spikes. A normal diagnostic tool cannot delete the crash data. Airbag24 deletes it during the repair.

The crash data remains stored in the unit until Airbag24 deletes it during the repair.

The other causes concern ageing, the connections and the power supply of the unit. Ageing components and cold solder joints can lead to failure, just as moisture and corrosion at plug connections can. Voltage spikes, for example from a weak battery or a jump start, also belong to this group.

How can you tell that the 285583405R is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently and so indicates the defect. In addition, fault messages appear in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be deleted.

In an emergency, the airbags and seatbelt pretensioners may then not trigger. An intermittent fault is just as important as one that is shown constantly. Take the warning seriously and have the system checked.

Which vehicles is the 285583405R fitted in?

The control unit 285583405R is fitted in these vehicles: Renault Mégane III (2008-2016). Whether your own unit is the right one is shown by comparing the part number on the label.

The vehicles are listed in detail as follows:

• Renault Mégane III (2008-2016)

Compare the part number on the label of the removed unit with this page, so that it is checked whether it is the correct unit. Above all, have the fault memory read out first, as only the result shows whether the control unit is defective or whether a plug or a 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 285583405R work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and carries out a function test. Afterwards, your own unit is returned to you. Airbag24 also deletes stored crash data.

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 285583405R get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof, so that it survives transport undamaged.