Airbag control unit with part number 8200321999

What does the airbag control unit 8200321999 do?

The 8200321999 coordinates the restraint system (SRS) of Renault. In an emergency it calculates from the signals of the crash sensors which airbags and seatbelt pretensioners fire. Faults in the system are shown via the airbag warning light.

The evaluation runs almost in real time, because in an accident every moment counts. At the same time, the unit monitors the wiring and the connected components.

If an accident has occurred, the control unit stores crash data and locks itself. The lock ends only with a repair.

Why does the control unit 8200321999 fail?

The most common cause is crash data that remained in the memory after an accident, even if no airbag was triggered. A normal diagnostic tool cannot remove it. Further triggers are ageing components, cold solder joints, moisture or corrosion on plug connectors, and voltage spikes.

If a failure follows an accident, the crash data should therefore be the first thing to check. It is not noticeable during driving.

The other causes lie more in the electronics and the connections. Components age over time, solder joints can go cold, and moisture or corrosion on plugs disrupts the contact. Voltage spikes arise, for example, from a weak battery or when a jump start is connected.

How can you tell that the 8200321999 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and through error messages there. The diagnostic tool then finds no connection to the control unit, and the fault memory cannot be cleared. In this state, airbags and seatbelt pretensioners may possibly fail to deploy in an emergency.

Such signs are unambiguous and call for an inspection.

A fault that is shown only intermittently is still worth reading out of the fault memory.

Which vehicles is the 8200321999 fitted in?

The list will show you whether a vehicle comes into question. The 8200321999 is fitted in these vehicles: Renault Scénic II (2003-2009); Renault Grand Scénic II (2003-2009).

The vehicles known for this part number are listed below:

• Renault Scénic II (2003-2009)
• Renault Grand Scénic II (2003-2009)

Compare the part number on the label of the removed unit with this page. This only tells you that the unit matches the part number. Whether the control unit itself is defective or a plug or cable is the cause only becomes clear from the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 285583229R, 603989700, 607993600, 8200340431, 8200411013, 8200412042A.

How does the repair of the 8200321999 work?

First you read out the fault memory and attach the log. Then you disconnect the battery, and only after that remove the control unit and create the repair order online. Then send the well-packed unit in, and Airbag24 takes over testing, repair and test.

At Airbag24 the unit is first checked, and defective components are replaced. Stored crash data is deleted before the function test takes place. Processing at Airbag24 is planned for 3–4 working days.

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 8200321999 get to Airbag24?

The unit goes to Airbag24 as a parcel, or you arrange a UPS collection for an extra charge. After the repair, UPS brings it back to you.

Place the printed repair order in the parcel. Pack the control unit shock-proof before it sets off.