Airbag control unit with part number 8200322004

What does the airbag control unit 8200322004 do?

The 8200322004 is the airbag control unit of the restraint system in Renault. It processes crash sensor data, determines within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

The airbag warning light in the instrument cluster shows this as soon as the control unit registers a fault. Every fault message is therefore an indication of how the system is functioning.

The control unit only works correctly when the sensors, wiring and power supply all match.

Why does the control unit 8200322004 fail?

Stored crash data is the most common cause, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are ageing components, cold solder joints, moisture and corrosion, and voltage spikes.

The crash data remains stored in the unit even if the vehicle continued to be driven after the accident.

Over time the electronic components age, and solder joints on the circuit board can go cold. Moisture and corrosion at the plug connections also disrupt contact.

Voltage spikes also occur in the vehicle electrical system, for example after a jump start.

How can you tell that the 8200322004 is defective?

A defect shows up as the airbag warning light, as a fault message in the instrument cluster and as a lack of connection between the diagnostic tool and the control unit. If the fault memory cannot be cleared, that is also a finding. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

These signs appear singly or together:

• warning light in the instrument cluster stays on permanently
• warning light in the instrument cluster is only on intermittently
• fault message in the instrument cluster
• diagnostic tool receives no connection to the control unit
• fault memory cannot be cleared

Each of these signs is a reason for a prompt check of the restraint system.

Which vehicles is the 8200322004 fitted in?

The control unit 8200322004 is fitted in these vehicles: Renault Scénic II (2003-2009); Renault Mégane II (2002-2009); Renault Grand Scénic II (2003-2009). The part number is the feature by which the assignment is made.

The list contains the vehicles for this part number:

• Renault Scénic II (2003-2009)
• Renault Mégane II (2002-2009)
• Renault Grand Scénic II (2003-2009)

Comparing the part number on the label with this page only confirms that it is the correct unit. Having the fault memory read out beforehand shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 603989700, 607993600, 8200257044E, 8200321999, 8200337245, 8200337247.

How does the repair of the 8200322004 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, only then remove the control unit, and send it in well packed after creating a repair order online. At Airbag24, checking, repair and function test usually take 3–4 working days.

Airbag24 places the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Only then is your own unit sent 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 8200322004 get to Airbag24?

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

Enclose the printed repair order in the parcel, and pack the unit so that it is shock-resistant.