Airbag control unit with part number 8200411956

What does the airbag control unit 8200411956 do?

The airbag control unit 8200411956 is the central control unit of the restraint system (SRS) in Renault. It evaluates the signals from the impact sensors, decides within milliseconds in an emergency which airbags and seatbelt pretensioners fire, and monitors the system constantly.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. It therefore coordinates the entire chain from the sensors to the igniters.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 8200411956 fail?

For the 8200411956, the most common cause is stored crash data after an accident, even if no airbag has been triggered. A normal diagnostic tool cannot delete this data; Airbag24 removes it during the repair. Aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible causes.

The crash data remain in the memory, even when nothing is visible from the outside. For a vehicle that has been in an accident, checking these entries is therefore a sensible first step.

The other causes concern the electronics themselves. Components age, solder joints can go cold, and moisture gets into plugs and causes corrosion. Voltage spikes, for example from a weak battery or jump-starting, also put strain on the unit.

How can you tell that the 8200411956 is defective?

On the 8200411956, a defect shows itself through the airbag warning light, a message in the instrument cluster, the diagnostic tool making no contact, or a fault memory that cannot be cleared. A fault memory that cannot be cleared is also a sign of a problem.

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

If the warning light is active, airbags and seatbelt pretensioners may not be able to trigger in an emergency. So have the finding checked promptly rather than waiting.

Which vehicles is the 8200411956 fitted in?

The control unit 8200411956 is fitted at Renault in these vehicles: Renault Scénic II (2003-2009); Renault Grand Scénic II (2003-2009).

The following vehicles are recorded for this part number:

• 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 ensures that you have the correct unit in front of you. Also have the fault memory read out beforehand, because only this record shows whether the control unit is defective or whether a plug or cable is the cause.

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 8200411956 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit. Create a repair order online and send in the well-packed unit. Airbag24 examines it, repairs it and tests the function.

The sequence is for safety reasons: the control unit is only removed after the battery has been disconnected.

At Airbag24 checking, repairing and testing usually take 3–4 working days. Defective components are replaced, stored crash data is deleted, and then the functional test follows. 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 8200411956 get to Airbag24?

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

Put the printed repair order into the parcel and pack the control unit shockproof.