Airbag control unit with part number 6C0 959 655 AF

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

The 6C0 959 655 AF is the central control unit of the restraint system (SRS) in Volkswagen. It evaluates the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the entire system continuously.

If the system detects a fault, it shows this via the airbag warning light in the instrument cluster. After an accident the control unit stores crash data and locks itself. This lock is only lifted by the repair.

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

The most common cause lies in crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot delete this data. Other possible causes are aged electronic components, cold solder joints, moisture or corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

That Airbag24 deletes the crash data during the repair is not a contradiction. What is meant is only that you cannot remove it with common tools.

Which of these causes actually applies can only be established by examining the circuit board and the plug connections.

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

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. In addition there may be a fault message in the instrument cluster, no connection to the diagnostic tool and a fault memory that cannot be cleared.

With a defective control unit, airbags and seatbelt pretensioners may possibly not deploy in an emergency. Take every one of these displays seriously and have the cause clarified promptly.

The warning light makes the fault visible as soon as the system detects it. A glance at the instrument cluster is therefore enough to notice the message.

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

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

The individual vehicles are shown in the following list.

• Volkswagen Polo 5 (6C) (2014-2017)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the correct unit in front of you. Also have the fault memory read out: only this result shows whether the control unit is defective or whether a plug or a 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 AF work?

First you read out the fault memory and attach the log to the unit. Then you disconnect the battery and only afterwards remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Afterwards you create the repair order online and pack the unit well before you send it in. Airbag24 checks it on the test bench, replaces defective components, deletes the stored crash data and carries out a function test. After that your own unit is returned to you.

This time limit relates solely to the testing, repair and function check at Airbag24. 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 AF 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.

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