Airbag control unit with part number 8W0959655AA

What does the airbag control unit 8W0959655AA do?

In the restraint system (SRS) of Audi the airbag control unit 8W0959655AA takes over control. The signals of the crash sensors arrive there; within milliseconds it makes the decision which airbags and seatbelt pretensioners respond. It also monitors the system continuously and shows faults on the airbag warning light.

After an accident the unit stores crash data and locks itself.

Why does the control unit 8W0959655AA fail?

The most frequent cause is crash data stored after an accident, even without an airbag firing. With this control unit, erasing the crash data is often not possible; if you want it erased, contact Airbag24 briefly before sending the unit in, and Airbag24 will then check the number. Other causes are aged components, cold solder joints, corrosion on plug connections and voltage spikes.

The further causes include, in detail:

• ageing of electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or a jump start

Crash data cannot be erased with a normal diagnostic tool. Which cause applies in the individual case is determined by the check at Airbag24.

How can you tell that the 8W0959655AA is defective?

If the airbag warning light in the instrument cluster stays on permanently or only now and then, it is a warning sign. In addition there may be an error message in the instrument cluster, a failed connection to the diagnostic tool, or a fault memory that cannot be cleared. In such a case the airbags and seatbelt pretensioners may not trigger in an emergency.

These signs are clear enough that you should have the system checked promptly.

Which vehicles is the 8W0959655AA fitted in?

The airbag control unit 8W0959655AA is fitted in these vehicles: Audi Q5 FYB Sportback (2020-2024), FY Facelift (2020-2024) and FY (2017-2020).

The vehicles are listed in the following list.

• Audi Q5 FYB Sportback (2020-2024)
• Audi Q5 FY Facelift (2020-2024)
• Audi Q5 FY (2017-2020)

Compare the part number on the label of the removed unit with this page. That only shows whether you have the right unit. Whether the control unit is defective or whether a plug or cable is the cause is shown by the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 80A 959 655 AA, 80A 959 655 AC, 80A 959 655 AE, 80A 959 655 G, 80A 959 655 J, 80A 959 655 L.

How does the repair of the 8W0959655AA work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online.

If you want the crash data erased, contact Airbag24 briefly before sending the unit in. Then pack the unit well and send it in.

At Airbag24 the workshop checks the unit on the test bench, repairs defective components and carries out a function test. Afterwards your own unit is returned. Processing 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 8W0959655AA get to Airbag24?

Either you hand over the unit as a parcel or you book a UPS collection for an extra charge. The return shipment after the repair is also made by UPS.

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