Airbag control unit with part number 8200738879

What does the airbag control unit 8200738879 do?

The airbag control unit 8200738879 is the central switching unit of the restraint system (SRS) of Renault. It receives the signals from the crash sensors, decides within milliseconds in the event of an impact whether to trigger, and monitors the system during operation. It reports detected faults via the airbag warning light.

After an accident the unit creates crash data and then locks itself. Airbags and seatbelt pretensioners depend on this one unit for their function, which gives it a special role for safety in the vehicle.

Why does the control unit 8200738879 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot remove it. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or jump starting.

Crash data remains in the unit's memory until it is erased. A single accident in which no airbag fired is enough for this.

The other causes concern electronics in general. Components age, solder joints can go cold, and moisture combined with corrosion damages plug connections. Voltage spikes also belong here.

How can you tell that the 8200738879 is defective?

A fault becomes visible when the airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be erased. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

The warning light shows the fault directly. If you see it lit, the system has detected a fault, and reading out the fault memory gives the next clue.

A single one of these signs is reason enough for an inspection.

Which vehicles is the 8200738879 fitted in?

The 8200738879 is fitted in these vehicles: Renault Scénic II (2003-2009); Renault Grand Scénic II (2003-2009).

The list shows the vehicles for which this part number is recorded with us.

• 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. The comparison gives you nothing beyond confirmation that it is the right unit. The fault memory must be read out beforehand, because only this log shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 603989700, 607993600, 8200321999, 8200340431, 8200375209, 8200401303.

How does the repair of the 8200738879 work?

First have the fault memory read out and attach the log; then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the well-packed unit. Airbag24 inspects it, repairs defective components, erases the crash data and carries out a function test; processing usually takes 3–4 working days.

The order is binding, because it ensures safety during removal.

After the function test, your own unit is returned 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 8200738879 get to Airbag24?

You 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.

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