Airbag control unit with part number 985108994R

What does the airbag control unit 985108994R do?

The airbag control unit 985108994R controls the restraint system (SRS) of Renault. It processes the messages from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds of an accident.

At the same time it monitors the system continuously and reports faults via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself.

Why does the control unit 985108994R fail?

Stored crash data is the most common cause for the 985108994R, even if no airbag was triggered in the accident. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

After an accident the crash data remains in the memory, and a normal diagnostic tool cannot remove it. Airbag24 erases it during the repair.

The other causes involve aging electronics, damp or corroded connections, and current spikes, for example when starting with a weak battery.

How can you tell that the 985108994R is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently if the 985108994R has a defect. A fault message may also appear, the diagnostic tool receives no connection to the control unit, and the fault memory cannot be cleared.

The warning light is the most important signal of the system, because it reports every fault it detects. Without it, a problem could remain hidden for a long time.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Therefore take the warning seriously and have the fault checked.

Which vehicles is the 985108994R fitted in?

With Renault, this control unit does not occur in every model. The 985108994R is fitted in these vehicles: Renault Captur II (from 2019).

The vehicles assigned to this part number include the following:

• Renault Captur II (from 2019)

Compare the part number on the label of the removed unit with this page. This only confirms that you have the correct unit. Whether the control unit itself is defective is only clarified by the fault memory. Have it read out before removal, because it also shows whether a connector or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 985100475R, 985104294R, 985105725R, 985107486R.

How does the repair of the 985108994R work?

First have the fault memory of the 985108994R read out and enclose the log. Then disconnect the battery and only then remove the control unit.

Next, create a repair order online and send the well-packed unit.

Airbag24 checks the control unit on the test bench, replaces defective components and erases stored crash data. A function test follows. Processing at Airbag24 usually takes 3–4 working days, after which the unit returns 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 985108994R get to Airbag24?

The 985108994R reaches Airbag24 either as a parcel or via a UPS collection that you book for an extra charge. The return is made by UPS.

Enclose the printed repair order in the parcel. The unit needs shock-resistant packaging.