Airbag control unit with part number 985101994R

What does the airbag control unit 985101994R do?

The airbag control unit 985101994R is the central control unit of the restraint system (SRS) for Renault. It evaluates the signals from the crash sensors and, in a crash, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

The unit monitors the entire system continuously. It reports detected faults via the airbag warning light in the instrument cluster.

After a crash, it stores crash data and locks itself.

Why does the control unit 985101994R fail?

The most common cause with the 985101994R is crash data stored after a crash, even if no airbag has deployed. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A normal diagnostic tool cannot erase the crash data. Airbag24 erases it during the repair.

Voltage spikes arise, for example, from a weak battery or when connecting a jump start. Such influences can strain the control unit just as much as the other causes listed.

How can you tell that the 985101994R is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, an error message appears, the diagnostic tool gets no connection to the control unit 985101994R, and the fault memory cannot be cleared.

In an actual crash, the airbags and seatbelt pretensioners may not deploy in the event of such a fault. Have the indicator checked promptly.

Which vehicles is the 985101994R fitted in?

The control unit 985101994R is fitted in this Renault vehicle: Renault Mégane III (2008-2016). This information refers to exactly this part number.

The vehicles with this control unit at a glance:

• Renault Mégane III (2008-2016)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the correct unit in front of you. Also have the fault memory read out beforehand: only this result shows whether the control unit itself is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285581365R, 8200962388, 985105478R.

How does the repair of the 985101994R work?

Processing, repair and functional testing at Airbag24 usually take 3–4 working days. For the 985101994R, the following order applies during removal: read out the fault memory and include the log, disconnect the battery, and only then remove the control unit. Then create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a functional test. Afterwards you receive your own unit back. 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 985101994R get to Airbag24?

You send the control unit 985101994R to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the unit shockproof.