Airbag control unit with part number 8200112749

What does the airbag control unit 8200112749 do?

The airbag control unit 8200112749 is the central control unit of the restraint system (SRS) for Renault. It processes the signals from the crash sensors, decides within milliseconds of an impact whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. This message is the first sign that something in the system is wrong.

After an accident the control unit stores crash data and then locks itself. You will find more on the effects in the section on the cause of the fault.

Why does the control unit 8200112749 fail?

Most often this is due to crash data stored after an accident, even if no airbag triggered. A normal diagnostic tool cannot remove them. In addition, ageing components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are possible.

Stored crash data is therefore the first thing to check in the event of a failure. It remains in the memory of the unit even if the vehicle looks unremarkable after the incident. The fault search should therefore start with the memory.

The other causes lie in the electronics and at the connections. Ageing components and cold solder joints can lead to a failure, just as moisture and corrosion at the plugs can. Voltage spikes, for example from a weak battery or jump starting, add further strain on the unit.

How can you tell that the 8200112749 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool finds no connection to the control unit. In addition, the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may possibly not trigger. The warning light shows the defect itself, so no separate test is needed to notice it. As soon as the light stays on permanently, you should have the system checked.

Which vehicles is the 8200112749 fitted in?

The control unit 8200112749 is fitted in these vehicles: Renault Trafic II (2001-2014).

The information is based on our data for this part number. The vehicles at a glance:

• Renault Trafic II (2001-2014)

Compare the part number on the label of the removed unit with this page, so that you have the correct unit. This comparison clarifies nothing more. Have the fault memory read out beforehand, because only this log shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 608361600E, 7701071459, 8200177654, 8200402592, 8200435339, 8200676895E.

How does the repair of the 8200112749 work?

First read out the fault memory and enclose the log with the unit. Then disconnect the battery and only then remove the control unit. Afterwards create a repair order online and send in the unit well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. As a rule, Airbag24 plans 3–4 working days for checking, repairing and testing. Afterwards 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 8200112749 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.

The printed repair order belongs in the parcel. Pack the unit shock-proof before you ship it.