Airbag control unit with part number 8200412026

What does the airbag control unit 8200412026 do?

The airbag control unit 8200412026 controls the restraint system (SRS) of Renault. It processes the messages from the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

Outside an accident the unit monitors the entire system without interruption. If it detects a fault, it shows it via the airbag warning light.

After an accident the control unit stores crash data and then locks itself. In the event of a defect, a targeted check is therefore the right way forward.

Why does the control unit 8200412026 fail?

On the 8200412026, the most common cause after an accident is stored crash data, even if no airbag has triggered; an ordinary diagnostic tool cannot erase it. Other causes include aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

In addition, the following causes come into consideration:

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

Crash data remains in place with an ordinary diagnostic tool. Airbag24 erases it during the repair.

How can you tell that the 8200412026 is defective?

On the 8200412026, a defect shows up through the airbag warning light in the instrument cluster, which lights up permanently or from time to time. Added to this are a fault message there, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

Typical signs at a glance:

• Airbag warning light, permanently or from time to time
• Fault message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then not trigger. The warning light indicates exactly this state, so do not ignore it.

Which vehicles is the 8200412026 fitted in?

The assignment applies to vehicles from Renault. The control unit 8200412026 is fitted in these vehicles: Renault Mégane II (2002-2009).

The vehicles stored for this part number in detail:

• Renault Mégane II (2002-2009)

Comparing the part number on the label of the removed unit with this page only ensures that it is the right unit. Also have the fault memory read out beforehand: only this log 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 8200257044E, 8200337245, 8200412026B, 8200682381.

How does the repair of the 8200412026 work?

For the 8200412026, first have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit. Next create the repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Afterwards the unit goes back to you. Processing at Airbag24 usually takes 3–4 working days.

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 8200412026 get to Airbag24?

You send the 8200412026 in as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns the control unit to you by UPS.

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