Airbag control unit with part number 985100766R

What does the airbag control unit 985100766R do?

The airbag control unit 985100766R is responsible for the restraint system (SRS) at Renault. It measures the course of an accident via the crash sensors, decides within milliseconds on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

If a fault occurs, the unit switches on the airbag warning light. The fault is additionally stored in memory.

Why does the control unit 985100766R fail?

The 985100766R most often fails because of crash data stored after an accident, even without a deployed airbag. Aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes from a weak battery or jump-starting may also contribute.

Crash data does not disappear with a common diagnostic tool. It stays in the unit until it is erased during the repair.

The other factors are hard to recognise from outside. Older electronics lose reliability, plug connections corrode when moisture gets in, and voltage spikes from a weak battery stress components.

How can you tell that the 985100766R is defective?

A defect on the 985100766R shows up mainly through the airbag warning light, which lights up permanently or intermittently. A fault message in the instrument cluster may also appear. In an emergency, airbags and seatbelt pretensioners could possibly fail to trigger.

Even if the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be cleared, there is reason for suspicion. Have such findings clarified promptly.

Which vehicles is the 985100766R fitted in?

At Renault, the 985100766R is assigned only to this vehicle: Renault Koleos II (from 2016).

The line below lists the vehicle with the assignment.

• Renault Koleos II (from 2016)

Both steps help with the comparison. Comparing the part number on the label with this page only confirms the identity of the unit. Reading out the fault memory before removing anything shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 985105619R, 985106952R.

How does the repair of the 985100766R work?

First read out the fault memory and enclose the log, then disconnect the battery and only then remove the 985100766R. Finally create the repair order online and send in the well-packed unit.

Airbag24 examines the unit on the test bench and repairs defective components. Stored crash data is erased, and a function test concludes the process. Processing at Airbag24 usually takes 3–4 working days.

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 985100766R get to Airbag24?

You send the 985100766R as a parcel to Airbag24 or book a UPS collection for an extra charge. UPS handles the return after the repair.

Enclose the printed repair order in the parcel, and the unit must be packed shock-proof.