Airbag control unit with part number 2Q0 959 655 AE

What does the airbag control unit 2Q0 959 655 AE do?

The airbag control unit 2Q0 959 655 AE is the central switching point of the restraint system (SRS) in Audi. It evaluates the signals from the crash sensors, determines within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. Faults are indicated by the airbag warning light.

The vehicle's manufacturer number Bosch 0285014727 is also printed on the housing. After an accident the control unit stores crash data and locks itself, a behaviour that is part of the system concept.

The crash sensors continuously deliver measured values, which the unit evaluates independently.

Why does the control unit 2Q0 959 655 AE fail?

The most common cause with the 2Q0 959 655 AE is crash data stored after an accident, even if no airbag has deployed. These data cannot be erased with a normal diagnostic tool.

The absence of an airbag deployment does not mean that no data was created. Airbag24 removes the crash data during repair.

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

Which of these causes is actually present is shown only by reading out the fault memory.

How can you tell that the 2Q0 959 655 AE is defective?

The airbag warning light in the instrument cluster lights up on the 2Q0 959 655 AE permanently or intermittently. In addition a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

Without repair, airbags and seatbelt pretensioners may not deploy in an emergency. The warning light indicates the defect and is therefore the most important warning signal in the vehicle.

Which vehicles is the 2Q0 959 655 AE fitted in?

The control unit 2Q0 959 655 AE is fitted in these vehicles: Audi A1 GB (from 2018).

The list follows showing the vehicles that Airbag24 has assigned to this unit.

• Audi A1 GB (from 2018)

Compare the part number on the label of the removed unit with this page. That only confirms that you have the right unit. Have the fault memory read out in advance, because only that result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 2Q0 959 655 AK, 2Q0959655AC.

How does the repair of the 2Q0 959 655 AE work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the 2Q0 959 655 AE only then and create a repair order online.

Afterwards send the unit in well packed. At Airbag24 it is checked, defective components are replaced and a function test follows; these steps usually take 3–4 working days.

After that your own unit goes back to you. 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 2Q0 959 655 AE get to Airbag24?

You send the control unit 2Q0 959 655 AE to Airbag24 as a parcel or book a UPS collection for an extra charge. After repair, the unit comes back to you by UPS.

Put the printed repair order into the parcel, and the unit must be packed shock-resistant.