Airbag control unit with part number 985103011R

What does the airbag control unit 985103011R do?

The airbag control unit 985103011R is the central control unit of the restraint system (SRS) for Renault. It evaluates the signals from the crash sensors and, in the event of an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself.

The unit monitors the entire system continuously and reports faults via the airbag warning light in the instrument cluster. This lets you, as the driver, recognise that something is wrong with the restraint system. The safety of the occupants therefore depends largely on this control unit.

The lock is only released by the repair.

Why does the control unit 985103011R fail?

Most common cause with the 985103011R: crash data stored after an accident that cannot be erased with a standard diagnostic tool. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The unit also stores crash data when no airbag has deployed. Airbag24 erases them during the repair. These causes are also possible:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 985103011R is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, indicating a fault in the 985103011R. It may also come with a fault message in the instrument cluster, a lack of connection to the diagnostic tool, and a fault memory that cannot be cleared.

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy. Therefore, have the finding checked promptly. The underlying cause cannot be determined from these signs alone. Signs of this kind should not be ignored.

Which vehicles is the 985103011R fitted in?

The 985103011R is fitted in this vehicle: Renault Mégane III (2008-2016). To see whether your car is one of them, check the list on this page.

These vehicles are listed for this part number:

• Renault Mégane III (2008-2016)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Whether the control unit is faulty or a connector or cable is the cause is shown only by the fault memory read out beforehand. Therefore, have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 285581365R, 8200962388, 985105478R.

How does the repair of the 985103011R work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the 985103011R. 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 functional test checks the unit before it is sent back. Your unit then goes 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 985103011R get to Airbag24?

You send the 985103011R in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 brings it back to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant. A well-packed unit arrives more safely. Make sure the parcel is securely sealed.