Airbag control unit with part number 6C0 959 655 AN

What does the airbag control unit 6C0 959 655 AN do?

The airbag control unit 6C0 959 655 AN is the central unit of the restraint system (SRS) for Volkswagen. It processes the signals from the crash sensors, determines in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and checks the system continuously.

The control unit indicates faults via the airbag warning light. The display in the instrument cluster is the visible signal to you that something is wrong in the restraint system.

After an accident, the unit stores crash data and locks itself. The evaluation of the sensor signals runs entirely in the background.

Why does the control unit 6C0 959 655 AN fail?

The most common cause is crash data stored after an accident, even if no airbag has fired. Aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting, can also cause failure.

A normal diagnostic tool cannot erase the crash data, so it remains in the control unit. That is exactly why such a finding keeps coming up during readout.

The other causes relate to the electronics and the connections within the unit. Whether one of them applies is shown by the examination in each individual case.

How can you tell that the 6C0 959 655 AN is defective?

The airbag warning light in the instrument cluster lights up constantly or only intermittently. An error message in the instrument cluster is added, the diagnostic tool receives no connection to the control unit, and the fault memory cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

That the light only comes on intermittently does not mean that everything is fine. It signals a detected fault, and you should act on it.

A missing connection to the diagnostic tool may originate from the control unit, but it does not have to. Only reading out the fault memory shows the cause.

Which vehicles is the 6C0 959 655 AN fitted in?

The control unit 6C0 959 655 AN is fitted in these vehicles: Volkswagen Polo 5 (6C) (2014-2017).

Below you will find the models that are recorded with this control unit in our data.

• Volkswagen Polo 5 (6C) (2014-2017)

First compare the part number on the label of the removed unit with this page. This only confirms that you have the right unit. Then have the fault memory read out before removing the unit. Only this log 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 285010527, 6C0 959 655 A, 6C0 959 655 J, 6R0 959 655 K, 6R0959655C.

How does the repair of the 6C0 959 655 AN work?

At Airbag24, the test, repair and function check usually take 3–4 working days. Beforehand, have the fault memory read out, attach the log and disconnect the battery before removing the control unit. Then create a repair order online and send the unit in well packed.

The order of these steps is for safety reasons and must therefore be observed. The unit is only removed after the battery has been disconnected.

Airbag24 examines the unit on the test bench, replaces defective components and deletes the stored crash data. After that comes a function test, and your own unit is returned.

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 6C0 959 655 AN get to Airbag24?

You send the control unit as a package or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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