Airbag control unit with part number 985108292R

What does the airbag control unit 985108292R do?

The 985108292R is the airbag control unit for Renault and controls the restraint system (SRS). In the event of an accident, it checks the signals from the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered. During operation, it monitors the system; detected faults are shown via the airbag warning light.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 985108292R fail?

Stored crash data is the most common cause, even when no airbag has deployed. A standard diagnostic tool cannot delete it; Airbag24 deletes it during the repair. Other possible causes include aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Electronic components age over time, and cold solder joints can interrupt contacts. Moisture and corrosion attack plug connections.

Voltage spikes occur, for example, with a weak battery or when jump-starting. Such stresses can damage components in the control unit 985108292R.

How can you tell that the 985108292R is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently if there is a fault on the 985108292R. In addition, there is a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

The signs in detail:

• Airbag warning light in the instrument cluster stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool cannot find the control unit and does not establish a connection
• Fault memory cannot be cleared

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy. For this reason, have the system checked promptly.

Which vehicles is the 985108292R fitted in?

The 985108292R is fitted in these vehicles: Renault Mégane III (2008-2016). To check whether your car is one of them, compare it with the vehicles listed.

The vehicles in detail are these:

• Renault Mégane III (2008-2016)

These steps will help you. Compare the part number on the label of the removed unit with this page: this only confirms that it is the right unit. Have the fault memory read out beforehand, because only that shows whether the control unit is faulty or 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 985108292R work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit 985108292R. Then create a repair order online and send in the well-packed unit. Airbag24 checks it on the test bench, replaces defective components, deletes stored crash data and carries out a function test.

The sequence is mandatory for safety reasons: first the read-out, then disconnecting the battery, and finally the removal.

Processing at Airbag24 usually takes 3–4 working days and includes checking, repairing and testing. Your own unit is then sent back 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 985108292R get to Airbag24?

You send the control unit 985108292R 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.