Airbag control unit with part number 285587797R

What does the airbag control unit 285587797R do?

The airbag control unit 285587797R forms the central control unit of the restraint system (SRS) for Renault. It evaluates the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

The control unit reports faults via the airbag warning light in the instrument cluster. The lock is only lifted by the repair.

Why does the control unit 285587797R fail?

With the control unit 285587797R, the most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot delete it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

The entry remains in the memory even if the vehicle then drives without any irregularities.

The other causes develop over a longer period and mainly affect plug connections and electronic components. Voltage spikes place additional strain on the electronics, for example from a weak battery or a jump start.

How can you tell that the 285587797R is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently if the control unit 285587797R is defective. In addition, there is an error message in the instrument cluster and a fault memory that cannot be cleared.

In this case the diagnostic tool finds no connection to the control unit. If there is a defect, airbags and seatbelt pretensioners may not deploy in an emergency. The warning light indicates that the system has detected a fault; only reading out the fault memory shows which cause lies behind it.

Which vehicles is the 285587797R fitted in?

This list shows you whether the control unit 285587797R belongs to your vehicle. The control unit 285587797R is fitted in these vehicles: Renault Mégane III (2008-2016).

The models to which this number belongs are listed here:

• Renault Mégane III (2008-2016)

First compare the part number on the label of the removed unit with this page; this only confirms that you have the correct unit. Also have the fault memory read out beforehand. Only this result shows whether the control unit itself is defective or whether a connector 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 285587797R work?

You have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit 285587797R. Next, you create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and runs a functional test. The unit itself is then returned to you.

Processing at Airbag24 usually takes 3–4 working days.

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 285587797R get to Airbag24?

You send the control unit 285587797R as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof. Make sure that it does not shift in the box and that the packaging is completely closed.