Airbag control unit with part number 8200307800

What does the airbag control unit 8200307800 do?

The airbag control unit 8200307800 controls the restraint system (SRS) in Renault. It processes the signals from the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself; only the repair lifts this lock.

The system checks itself during operation. If the control unit detects a fault, the airbag warning light in the instrument cluster comes on.

Why does the control unit 8200307800 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; an ordinary diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, such as with a weak battery or a jump start.

The data remains in memory even if no airbag was triggered.

Electronics age, solder joints can give way, and moisture attacks contacts. Such changes creep in and can show themselves only when the system reports that something is wrong.

Voltage spikes act on the electronics, for example when the battery is weak or when the vehicle is started with external power.

How can you tell that the 8200307800 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently if the 8200307800 has a defect. Added to this are a fault message in the instrument cluster, no connection from the diagnostic tool to the control unit, and a fault memory that cannot be cleared.

With signs like these, airbags and seatbelt pretensioners may not deploy in an emergency. Therefore have the system checked promptly.

Only the reading of the fault memory shows whether the control unit itself is affected.

Which vehicles is the 8200307800 fitted in?

A part number belongs to a specific type of unit. The control unit 8200307800 is fitted in these vehicles: Renault Mégane II (2002-2009).

Here are the vehicles at a glance:

• Renault Mégane II (2002-2009)

Two checks help before you remove anything. First, compare the part number on the label with this page; this only confirms that it is the correct unit. Second, have the fault memory read out, because only this record 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 8200257044E, 8200337245, 8200337247, 8200412026, 8200412026B, 8200682381.

How does the repair of the 8200307800 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Then create the repair order online and send the unit in well packed. At Airbag24 processing usually takes 3–4 working days.

Airbag24 examines the unit you send on the test bench, replaces defective components, erases stored crash data and carries out a function test. The unit is then sent 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 8200307800 get to Airbag24?

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

Enclose the printed repair order with the parcel and pack the unit shock-proof so that it arrives undamaged.