Airbag control unit with part number 8200411954

What does the airbag control unit 8200411954 do?

The airbag control unit 8200411954 controls the restraint system (SRS) of Renault. It evaluates the signals of the crash sensors, determines in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

An accident requires a decision within milliseconds, so the unit works constantly. It checks its sensors and triggering circuits at regular intervals.

Detected faults are indicated via the airbag warning light in the instrument cluster.

Why does the control unit 8200411954 fail?

Stored crash data after an accident is the most common cause, even without an airbag deployment, and an ordinary diagnostic tool cannot erase it. Other possible causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data remains stored in the unit after an accident and affects the fault diagnosis. Only the repair at Airbag24 erases it.

The other causes lie in the electronics themselves. Ageing components and cold solder joints interrupt connections. Moisture and corrosion at plug connections disturb the signals, and voltage spikes, for example from a weak battery or a jump start, damage the electronics.

How can you tell that the 8200411954 is defective?

A defect shows up as the airbag warning light lighting up permanently or intermittently, as an error message in the instrument cluster, as a diagnostic tool with no connection to the control unit, and as a fault memory that cannot be cleared. In that case airbags and seatbelt pretensioners may fail to deploy in a crash.

The warning light in the instrument cluster is the clearest sign. It reports the fault the unit has detected itself and should not be ignored.

A diagnostic tool that cannot establish a connection, or a fault memory that cannot be emptied, likewise point to a fault in the control unit.

Which vehicles is the 8200411954 fitted in?

The 8200411954 is fitted in these vehicles: Renault Scénic II (2003-2009); Renault Grand Scénic II (2003-2009).

The vehicles for which this part number is stored are listed below.

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

Comparing the part number on the label of the removed unit with this page only ensures that it is the correct unit. Have the fault memory read out beforehand. Only the result 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 8200411954 work?

You have the fault memory read out first and enclose the log. Then disconnect the battery, and only after that remove the control unit. Online, you create a repair order and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components and erases the crash data. A function test follows before the 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 8200411954 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. Airbag24 returns the repaired unit by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.