Airbag control unit with part number 8201229156

What does the airbag control unit 8201229156 do?

The airbag control unit 8201229156 is the central control unit of the SRS system in Renault. It constantly monitors the crash sensors and the components of the system, determines in a crash whether airbags and seatbelt pretensioners are triggered, and reports faults. After an accident it stores crash data and locks itself.

Fault messages are shown via the airbag warning light, which sits in the instrument cluster.

The unit has to trigger within milliseconds. This speed requires reliable electronics that work without dropouts.

Why does the control unit 8201229156 fail?

The most common cause is crash data stored after an accident, even when no airbag has deployed; it cannot be erased with a normal diagnostic tool. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, as well as voltage spikes, can also cause a failure.

Crash data is created after an incident and remains in the memory of the control unit. Without an airbag deployment it stays inconspicuous, but it is still there.

The other causes tend to be gradual. Components wear out, solder joints give way, and moisture attacks the contacts. A weak battery or a jump start puts voltage spikes into the vehicle's electrical system.

How can you tell that the 8201229156 is defective?

The airbag warning light stays on permanently or intermittently. Alongside it there may be a fault message in the instrument cluster, a diagnostic tool with no connection to the control unit, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The light is not harmless just because it goes out intermittently. Even intermittent illumination calls for an inspection.

Diagnosis on the control unit itself shows the finding. Without reading out the fault memory, however, the cause remains unclear.

Which vehicles is the 8201229156 fitted in?

The control unit 8201229156 is fitted in these vehicles: Renault Kangoo II (2008-2021). The list serves as a guide for matching.

The following vehicles are assigned:

• Renault Kangoo II (2008-2021)

You will find it easiest to compare the part number with the label on the removed unit directly on this page. It shows whether the unit fits. Whether it is faulty can only be established by the fault memory, which you should have read out beforehand, because a plug or cable can also be the cause.

For the same vehicles, we also repair control units with the part numbers 2840211503, 600589600, 606083300, 8200098402, 8200410188, 8200656331.

How does the repair of the 8201229156 work?

First have the fault memory read out and attach the log. Then disconnect the battery before the control unit is removed. After that, create a repair order online and send in the well-packed unit. At Airbag24, processing usually takes 3–4 working days.

Disconnecting the battery before removal is one of the mandatory safety steps.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and tests the function. Your own unit is returned to you afterwards.

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 8201229156 get to Airbag24?

You send the control unit 8201229156 to us as a parcel, or book a UPS collection for an extra charge. After the repair, the return is made by UPS.

Place the printed repair order in the box, and pack the unit shock-resistant.