Airbag control unit with part number 985106279R

What does the airbag control unit 985106279R do?

The unit 985106279R is the airbag control unit for Renault, the central component of the restraint system (SRS). It processes the signals from the crash sensors, decides on triggering within milliseconds in an accident, and stores crash data after an accident. After that it locks itself.

During operation the unit keeps the system under constant control and reports faults via the airbag warning light in the instrument cluster.

Besides the electronics in the unit, the wiring and connectors to the sensors and seatbelt pretensioners must also work correctly.

Why does the control unit 985106279R fail?

For the 985106279R, stored crash data is the most common cause, even when no airbag has fired. Other possible causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data stays in memory after an accident. A normal diagnostic tool cannot erase it; Airbag24 erases it during the repair.

The other causes develop gradually or come from outside, for example through a weak battery or a jump start. Only an examination separates these possibilities from one another.

How can you tell that the 985106279R is defective?

You can recognise a defect on the 985106279R mainly by the airbag warning light in the instrument cluster. In a real emergency, airbags and seatbelt pretensioners may then fail to fire.

These signs point to a defect:

• Airbag warning light stays on permanently or lights up intermittently
• Fault message appears in the instrument cluster
• Diagnostic tool cannot establish a connection to the control unit
• Fault memory cannot be cleared

The warning light shows the fault as soon as the system detects it. Do not postpone the check.

Whether the control unit, a connector or a cable is the cause is only clarified by diagnosis.

Which vehicles is the 985106279R fitted in?

The unit 985106279R is fitted in these vehicles: Renault Koleos II (from 2016).

This list names the vehicles recorded for this part number.

• Renault Koleos II (from 2016)

Compare the label on the removed unit with this page so that you have the right unit. Having the fault memory read out remains the most important step regardless, because it shows whether the control unit is defective or whether a connector 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 985106279R work?

Have the fault memory of the 985106279R read out and attach the log. Then disconnect the battery, remove the control unit, create a repair order online and pack the unit well before sending it in.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and runs a function test. Your own unit then goes back to you.

Processing at Airbag24 usually takes 3–4 working days. This time covers only checking, repairing and testing at Airbag24.

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 985106279R get to Airbag24?

You send the control unit 985106279R to Airbag24 as a parcel, or commission a UPS collection, which carries a fee. The return after the repair is made by UPS.

Enclose the printed repair order with the parcel and pack the unit shock-proof.