Airbag control unit with part number 985100769R

What does the airbag control unit 985100769R do?

On Renault the airbag control unit 985100769R runs the restraint system (SRS). It evaluates the crash sensors, determines in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

The unit shows faults in the system via the airbag warning light in the instrument cluster so that you can react.

Stored crash data remain in the control unit as long as they are not deleted.

Why does the control unit 985100769R fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; an ordinary diagnostic tool cannot remove them. Further causes are ageing of the electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

• Ageing of electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

Which cause applies only becomes clear from troubleshooting with the read-out fault memory.

How can you tell that the 985100769R is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

The light is the sign you should watch for; a check then clarifies the cause. If you notice anything unusual, contact a workshop promptly.

Which vehicles is the 985100769R fitted in?

The airbag control unit 985100769R is fitted in these vehicles: Renault Koleos II (from 2016).

The vehicles recorded for this part number are listed below:

• Renault Koleos II (from 2016)

Compare the part number on the label of the removed unit with this page; then you know that it is the right unit. You should have the fault memory read out beforehand, because only that result shows whether the control unit 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 985100769R work?

First have the fault memory read out and enclose the log. Then disconnect the battery, only remove the control unit afterwards and create a repair order online. Processing at Airbag24 takes 3–4 working days.

Airbag24 places the unit on the test bench, replaces defective components, deletes the crash data and runs a function test. The unit then returns to you.

The order of the steps is binding because it serves safety.

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 985100769R get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Enclose the printed repair order with the parcel, and pack the unit so that it is shock-resistant.