Airbag control unit with part number 985100872R

What does the airbag control unit 985100872R do?

The airbag control unit 985100872R is the central control unit of the restraint system (SRS) for Renault. It evaluates the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The manufacturer's part number Bosch 0285015100 is also stamped on the housing. Faults are reported by the unit via the airbag warning light; after an accident it stores crash data and locks itself, and only the repair lifts the lock.

Why does the control unit 985100872R fail?

The most common cause is crash data stored after an accident, even without a deployed airbag. Added to this are ageing components, cold solder joints, moisture and corrosion at connectors, and voltage spikes.

A normal diagnostic tool does not remove crash data. Airbag24 deletes it during the repair. Besides this, the following causes come into consideration:

• electronics that age over the course of use
• cold solder joints with poor contact
• moisture and corrosion at connectors
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 985100872R is defective?

Signs are an airbag warning light that stays on permanently or intermittently, a fault message in the instrument cluster, or a diagnostic tool with no connection to the control unit. Added to this is a fault memory that cannot be cleared. In that case, airbags and seatbelt pretensioners may not deploy in an emergency.

In detail, a defect shows itself like this:

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool with no connection to the control unit
• Fault memory cannot be cleared

The warning light constantly shows the driver the state of the system.

Which vehicles is the 985100872R fitted in?

The assignment to vehicles is made by Airbag24 for this unit. The control unit 985100872R is fitted in these vehicles: Renault Arkana I (from 2019).

The list below shows the vehicles assigned to this control unit.

• Renault Arkana I (from 2019)

Comparing the part number on the label of the removed unit with this page only confirms the identity of the unit. Whether the control unit itself is defective, or a connector or cable is responsible, is clarified by the fault memory that you have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 285015832, 285A40674R, 285A49105R, 5D3EEF4828, 985103085R.

How does the repair of the 985100872R work?

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

The sequence is binding for safety reasons.

At Airbag24 the unit is checked, defective components are replaced, the crash data is deleted and a function test is carried out. Afterwards your own unit goes back 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 985100872R get to Airbag24?

You send the unit as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

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