Airbag control unit with part number 985107296R

What does the airbag control unit 985107296R do?

The airbag control unit 985107296R controls the restraint system (SRS) of Renault. It evaluates the signals from the crash sensors, decides within milliseconds in a crash about airbags and seatbelt pretensioners, and monitors the system continuously. After a crash it stores crash data and locks itself.

Monitoring runs throughout the entire journey. The unit checks the sensors, ignition stages and the wiring to the triggers, and reports irregularities to the airbag warning light in the instrument cluster.

The control unit works together with sensors, wiring harness and display. A fault in one of these parts can therefore appear as an error in the control unit, even if the unit itself is in order.

Why does the control unit 985107296R fail?

The most common cause for the control unit 985107296R is stored crash data after an accident, even if no airbag has deployed. A standard diagnostic tool cannot delete this data. Aged components, moisture and voltage peaks are also possible causes.

The crash data remains in the memory of the control unit, and the fault display stays visible until the unit has been repaired.

The other causes concern the electronics itself. Electronic components age, solder joints can go cold, and moisture or corrosion disturbs plug connectors. Voltage peaks, for example with a weak battery or when starting with external power, put additional strain on the circuit.

How can you tell that the 985107296R is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently on the control unit 985107296R, and a fault message appears in the instrument cluster. If the diagnostic tool gets no connection to the control unit and the fault memory cannot be cleared, a defect is likely. In a real crash, airbags and seatbelt pretensioners may then fail to deploy.

The light is a sign that the system has detected a fault. Only the evaluation of the fault memory shows which cause lies behind it.

Which vehicles is the 985107296R fitted in?

The control unit 985107296R is fitted in: Renault Koleos II (from 2016).

The following overview lists the vehicle this part number is assigned to.

• Renault Koleos II (from 2016)

Compare the part number on the label of the removed unit with this page. That only ensures that it is the right unit. Also have the fault memory read out before sending it in, because only this 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 985107296R work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit 985107296R. Next, create a repair order online and send the well-packed unit in.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Afterwards your own unit is sent back to you. Processing at Airbag24 usually takes 3–4 working days.

The order of the steps is for safety reasons and therefore binding. 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 985107296R get to Airbag24?

You send the control unit 985107296R 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 shockproof.