Airbag control unit with part number 2Q0 959 655 AP

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

The 2Q0 959 655 AP is the SRS control unit for Audi and controls the restraint system. It evaluates the signals from the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

The unit also monitors the entire system. If it detects a fault, it indicates this via the airbag warning light in the instrument cluster.

In addition, the unit carries the supplier number Bosch 0285015323. After an accident it stores crash data and locks itself.

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

The most common cause with the 2Q0 959 655 AP is stored crash data after an accident, even if no airbag was deployed. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

Crash data cannot be erased with a normal diagnostic tool. The unit therefore keeps it in memory until Airbag24 removes it during the repair.

Aged components, cold solder joints and corrosion at plug connections are causes that develop over the course of use. Voltage spikes, on the other hand, occur suddenly, for example from a weak battery or a jump start.

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

The airbag warning light in the instrument cluster stays on permanently or intermittently. Further typical signs are:

• a fault message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• a fault memory that cannot be cleared

These signs on the 2Q0 959 655 AP show that the restraint system is not fully functional.

In an emergency, airbags and seatbelt pretensioners may fail to trigger. Such an indication therefore needs prompt clarification.

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

The comparison with the vehicle data shows whether your car is affected. The 2Q0 959 655 AP is fitted in these vehicles: Audi A1 GB (from 2018).

The list of vehicles follows here:

• Audi A1 GB (from 2018)

First compare the part number on the label of the removed unit with this page, so that you know it is the right unit. Also have the fault memory read out beforehand, because 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 2Q0 959 655 AK, 2Q0959655AC.

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

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online before sending the unit in, well packed.

At Airbag24 the unit is examined on the test bench, defective components are repaired, the stored crash data is erased and a function test is carried out. Processing at Airbag24 usually takes 3–4 working days. Your own unit is then returned 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 AP get to Airbag24?

You send the 2Q0 959 655 AP to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The printed repair order belongs in the parcel, and the unit must be packed shockproof.