Airbag control unit with part number 8Z0 959 655 F

What does the airbag control unit 8Z0 959 655 F do?

The airbag control unit 8Z0 959 655 F coordinates the SRS restraint system of Audi. It processes the signals from the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

The unit monitors the entire system continuously and reports faults via the airbag warning light in the instrument cluster.

In the event of an accident, it records the crash data and then locks itself.

Why does the control unit 8Z0 959 655 F fail?

Crash data that remains stored in the 8Z0 959 655 F after an accident is the most common cause, even if no airbag was triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

An ordinary diagnostic tool is not sufficient for this, because it cannot delete this data.

The other causes include ageing of electronic parts, cold solder joints, and moisture and corrosion on connectors. Each of these can lead to faults.

Voltage spikes from a weak battery or a jump start put additional strain on the electronics.

How can you tell that the 8Z0 959 655 F is defective?

You can recognise a defect on the 8Z0 959 655 F by the airbag warning light in the instrument cluster. It lights up permanently or intermittently and thus points to the control unit.

• Error message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

A finding like this means that airbags and seatbelt pretensioners may not trigger in an emergency.

Which vehicles is the 8Z0 959 655 F fitted in?

The control unit 8Z0 959 655 F is fitted in these vehicles: Audi A2 8Z (1999-2005).

Our assignment covers these vehicles for this unit:

• Audi A2 8Z (1999-2005)

Comparing the part number on the label of the removed unit with this page only confirms the identity of the unit. Also have the fault memory read out beforehand, because only this shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 8Z0 959 655 G, 8Z0959655E, 8Z0959655H.

How does the repair of the 8Z0 959 655 F work?

First have the fault memory read out and attach the log, then disconnect the battery and remove the control unit 8Z0 959 655 F. Airbag24 needs usually 3–4 working days for checking, repairing and testing.

Then create the repair order online and send the unit well packed.

At the test bench, the unit is checked at Airbag24, defective components are replaced, the crash data is deleted and a function test is carried out. The return shipment of your own unit follows. 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 8Z0 959 655 F get to Airbag24?

The control unit 8Z0 959 655 F reaches Airbag24 either as a parcel or via a UPS collection that you book for an extra charge. The return by UPS takes place after the repair.

Pack it shock-proof and enclose the printed repair order: that is all that is needed.