Airbag control unit with part number 285587266R

What does the airbag control unit 285587266R do?

As the airbag control unit 285587266R, it controls the restraint system (SRS) for Renault. It processes the signals from the crash sensors and, in a crash, selects within milliseconds which airbags and seatbelt pretensioners are to be deployed. After a crash, it stores crash data and locks itself.

The unit continuously monitors the restraint system itself. It shows detected faults via the airbag warning light in the instrument cluster.

Because the deployment of airbags and seatbelt pretensioners depends on this unit, a fault in it must be taken seriously. The lock is only lifted by the repair.

Why does the control unit 285587266R fail?

Stored crash data is the most common cause with the 285587266R, even if no airbag has deployed. A normal diagnostic tool cannot erase it; Airbag24 erases it during the repair. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

After a crash, crash data remains in the unit until it is erased. A diagnostic tool that only clears the fault memory does not reach it.

Aged electronic components and cold solder joints can cause faults that only appear after a longer period of operation.

Moisture and corrosion at plug connectors disrupt the contact. Voltage spikes, for example from a weak battery or a jump start, additionally strain the electronics.

How can you tell that the 285587266R is defective?

The airbag warning light in the instrument cluster indicates a fault in the 285587266R. In that case, the airbags and seatbelt pretensioners may not deploy in an actual crash.

• The warning light stays on permanently or only intermittently.
• An error message appears in the instrument cluster.
• A diagnostic tool gets no connection to the control unit.
• The fault memory cannot be cleared.

The light shows that the system has detected a fault, even if the vehicle drives normally. Only reading out the fault memory shows whether the control unit itself is the cause.

Which vehicles is the 285587266R fitted in?

The airbag control unit 285587266R is fitted in these vehicles: Renault Mégane III (2008-2016). Whether your vehicle is among them is shown by comparing it with the list.

The vehicles in detail:

• Renault Mégane III (2008-2016)

Compare the part number on the label of the removed unit with this page; this only ensures that it is the correct unit. Have the fault memory read out as well, because only this shows whether the control unit 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 285587266R work?

First have the fault memory of the 285587266R read out and include the log, then disconnect the battery and remove the control unit. Next, create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a functional test. The unit is then returned to you.

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 285587266R get to Airbag24?

You send the control unit 285587266R in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the unit shockproof.