Airbag control unit with part number 8200340427

What does the airbag control unit 8200340427 do?

The airbag control unit 8200340427 coordinates the restraint system (SRS) of Renault. In an accident it evaluates the sensor signals and determines within milliseconds which airbags and seatbelt pretensioners are triggered. It also monitors all components and reports faults via the airbag warning light.

During normal operation the unit runs unobtrusively in the background. If an accident occurs, it stores crash data and then locks itself.

Why does the control unit 8200340427 fail?

The most common cause is crash data remaining in the memory after an accident, even if no airbag was deployed. A standard diagnostic tool cannot erase it. Several general causes are also possible.

The other causes at a glance:

• aged electronic components,
• cold solder joints,
• moisture and corrosion at plug connectors,
• voltage spikes, for example from a weak battery or jump-starting.

Which of these applies can only be shown by a detailed examination of the unit.

How can you tell that the 8200340427 is defective?

A defect can show at the airbag warning light, which lights continuously or only intermittently, and as a fault message in the instrument cluster. The diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

The airbag warning light in the instrument cluster is the most important warning sign. It reports the fault itself, so you should look into it promptly.

Which vehicles is the 8200340427 fitted in?

Whether your car is affected can be checked against the list. The 8200340427 control unit of Renault is fitted in these vehicles: Renault Scénic II (2003-2009); Renault Mégane II (2002-2009); Renault Grand Scénic II (2003-2009).

The vehicles in detail:

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

On the one hand, compare the part number on the label of the removed unit with this page; this way you confirm it is the correct unit. On the other hand, have the fault memory read out beforehand, because only that shows whether the control unit is defective or 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 8200340427 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit. Afterwards create the repair order online and send in the unit.

Airbag24 checks it on the test bench, repairs defective components, erases stored crash data and carries out a function test. The unit is then returned to you.

At Airbag24 processing takes 3–4 working days in general, and this time applies only to checking, repairing and testing. 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 8200340427 get to Airbag24?

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

Put the printed repair order into the parcel; pack the unit shock-resistantly.