Airbag control unit with part number 985103823R

What does the airbag control unit 985103823R do?

The airbag control unit 985103823R manages the SRS restraint system in Dacia. It checks the crash sensors, determines in a crash within milliseconds which airbags and seatbelt pretensioners to trigger, and monitors the system during operation. Faults are indicated via the airbag warning light. After a crash it stores crash data and locks itself.

Monitoring begins as soon as the vehicle is switched on and ends only when it is switched off. If the unit detects an irregularity, it creates an entry in the fault memory.

The control unit is therefore both trigger and event store at the same time.

Why does the control unit 985103823R fail?

Crash data stored after an accident is the most common cause, even if no airbag has been triggered. A normal diagnostic tool cannot reach this data. Also possible are aged electronic components, cold solder joints, moisture and corrosion on plug connections, or voltage spikes, for example from weak batteries or a jump start.

An accident does not necessarily cause damage to the unit. The data merely document that something has happened.

The other triggers tend to arise towards the end of a long period of use. Electronics age, contacts oxidise, and voltage fluctuations additionally stress the components.

How can you tell that the 985103823R is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

These signs stand out:

• Airbag warning light lighting permanently or intermittently
• Fault message in the instrument cluster
• Missing connection between diagnostic tool and control unit
• Fault memory that cannot be cleared

If such a finding is present, airbags and seatbelt pretensioners may possibly fail to deploy in an emergency. Please have the system checked promptly.

Which vehicles is the 985103823R fitted in?

The 985103823R is fitted in these vehicles: Dacia Duster I Facelift (2013-2018) and I (2010-2013).

The list below shows the vehicles in which the unit is fitted.

• Dacia Duster I Facelift (2013-2018)
• Dacia Duster I (2010-2013)

Comparing the part number on the label with this page only confirms that it is the right unit. Only reading out the fault memory shows whether the control unit is defective or whether a plug or cable is the cause. Please have this done before sending the unit in.

For the same vehicles, we also repair control units with the part numbers 8200952847, 985105129R, 985106190R, A2C85841702.

How does the repair of the 985103823R work?

Before the control unit is removed, have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the unit. Online you create the repair order and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. The unit then 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 985103823R get to Airbag24?

You send the unit as a parcel or arrange a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order belongs in the parcel, and the unit must be packed shock-resistant.