Airbag control unit with part number 2Q0 959 655 BA

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

The airbag control unit 2Q0 959 655 BA controls the restraint system in Audi vehicles. It evaluates the sensor signals, determines within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system permanently.

The unit detects faults and indicates them via the airbag warning light. In addition, the housing carries the number Bosch 0285015888.

After a crash it stores crash data and locks itself.

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

On the 2Q0 959 655 BA, the most common cause is crash data stored after an accident, even if no airbag has triggered. A normal diagnostic tool cannot erase it; Airbag24 removes it during the repair. Aging, contact problems and voltage spikes are also possible causes.

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

Without reading out the fault memory, it is not possible to say with certainty which of these causes applies.

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

A defect on the 2Q0 959 655 BA shows at the airbag warning light, which stays on permanently or intermittently as soon as a fault has been detected. In addition, the instrument cluster displays a fault message, or the diagnostic tool finds no connection to the control unit.

As long as faults are stored, airbags and seatbelt pretensioners may not deploy in an emergency. A fault memory that cannot be cleared should therefore be checked promptly.

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

The control unit 2Q0 959 655 BA is fitted in these Audi vehicles: Audi A1 GB (from 2018). This assignment is stored for exactly this part number.

The following vehicles are stored for this part number:

• Audi A1 GB (from 2018)

Compare the part number on the label with this page. That confirms whether it is the correct unit. The cause is only revealed by the fault memory you have read out beforehand, since it shows whether the control unit is defective or whether a plug or cable is affected.

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 BA work?

Have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create a repair order online and send in the well-packed unit. Airbag24 checks, repairs and tests it.

Removal only takes place after the battery has been disconnected. This order is fixed for safety reasons.

At Airbag24, the unit is examined on the test bench. Defective components are replaced and stored crash data is deleted. Processing there usually takes 3–4 working days, after which your own unit is returned.

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 BA get to Airbag24?

You can send the 2Q0 959 655 BA as a parcel or have it collected by UPS for an extra charge. After the repair, Airbag24 returns the unit by UPS.

Place the printed repair order in the parcel and pack the unit shock-proof.