Airbag control unit with part number 985104910R

What does the airbag control unit 985104910R do?

The airbag control unit 985104910R coordinates the restraint system (SRS) for Renault. It evaluates the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners to trigger, and monitors the system continuously. It reports detected faults via the airbag warning light.

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

Monitoring runs in the background, and faults appear on the instrument cluster. The airbag warning light is therefore the signal by which you notice a fault in the system.

Why does the control unit 985104910R fail?

Stored crash data is the most common cause, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start.

Airbag24 erases the crash data during the repair of control unit 985104910R.

Electronic components age over time, and cold solder joints can interrupt the contact. Moisture and corrosion attack plug connectors.

Voltage spikes occur, for example, when the car is jump-started and stress the electronics.

How can you tell that the 985104910R is defective?

The airbag warning light on the instrument cluster lights up permanently or only intermittently when there is a defect in control unit 985104910R. A fault message on the instrument cluster, a lost connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared may also occur.

In an emergency, airbags and seatbelt pretensioners may then possibly not deploy.

In this case, have the system checked promptly.

Which vehicles is the 985104910R fitted in?

Control unit 985104910R is fitted in these vehicles: Renault Mégane III (2008-2016). To see whether your vehicle is one of them, compare it with the vehicles named.

The vehicles in detail:

• Renault Mégane III (2008-2016)

These steps will help you proceed. Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out beforehand, because only that shows whether the control unit is defective or a plug 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 985104910R work?

First have the fault memory read out and attach the log. Then disconnect the battery before you remove control unit 985104910R, and create the repair order online. Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test; processing usually takes 3–4 working days.

The order is mandatory for safety reasons. Pack the unit well before you send it in.

The 3–4 working days cover only checking, repairing and testing at Airbag24. Afterwards, your own unit is 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 985104910R get to Airbag24?

You send control unit 985104910R in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel, and pack the unit shock-proof. Make sure the parcel is securely closed.