Airbag control unit with part number 985106285R

What does the airbag control unit 985106285R do?

The airbag control unit 985106285R forms the control centre of the SRS system in Renault vehicles. It processes the measured values from the crash sensors, determines within the shortest possible time which airbags and seatbelt pretensioners fire in an accident, and monitors the system permanently. It reports detected faults via the airbag warning light; after an accident, it stores crash data and locks itself.

The system consists of several components, and the control unit coordinates them. It continuously compares incoming signals with the expected values and so detects deviations.

If the unit fails, the protective function of the entire system is affected.

Why does the control unit 985106285R fail?

For 985106285R, the most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot delete them. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

Airbag24 deletes the crash data during the repair. Whether a component in the unit is also affected is only shown by the fault memory.

Such causes can also lie outside the unit, for example in cables or connectors. The diagnosis decides which cause is present.

How can you tell that the 985106285R is defective?

The airbag warning light in the instrument cluster signals a fault in the 985106285R by lighting up permanently or intermittently. An error message appears in the instrument cluster alongside it, or the diagnostic tool finds no connection to the control unit; a fault memory that cannot be cleared also indicates this. Airbags and seatbelt pretensioners may then not deploy in an emergency.

The light is the most important warning signal. If the diagnostic tool cannot access the control unit, the cause does not necessarily lie in the unit, since cables or connectors are also possible.

An assessment depends on the overall picture of light, message and fault memory. If any of these indications appear, have the vehicle checked promptly.

Which vehicles is the 985106285R fitted in?

The airbag control unit 985106285R is fitted in these vehicles: Renault Mégane III (2008-2016). Checking your own car against this list shows whether it fits.

The list shows the vehicles recorded for this number.

• Renault Mégane III (2008-2016)

Compare the number on the label of the removed unit with this page; this only confirms that it is the correct unit. Have the fault memory read out beforehand, because only then does it become clear whether the control unit itself is affected 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 985106285R work?

First have the fault memory read out and include the report, then disconnect the battery and only then remove the control unit 985106285R. Create the repair order online, then pack the unit securely and send it in. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, renews defective components, deletes stored crash data and carries out a function test.

Your own 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 985106285R get to Airbag24?

The control unit 985106285R reaches Airbag24 either by parcel or via a UPS collection booked for an extra charge. The repaired unit is returned by UPS.

Include the printed repair order with the parcel and pack the unit so that it is shockproof.