Airbag control unit with part number 80A 959 655 L

What does the airbag control unit 80A 959 655 L do?

The airbag control unit 80A 959 655 L is the control unit of the restraint system (SRS) for Audi. It evaluates signals from the crash sensors, determines within milliseconds in an accident which airbags and seatbelt pretensioners fire, and monitors the system continuously.

Detected faults are reported via the airbag warning light in the instrument cluster, so faults become visible to you. The unit therefore also monitors the system in everyday driving.

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

Why does the control unit 80A 959 655 L fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Further causes concern the electronics and connections.

Crash data cannot be cleared with an ordinary diagnostic tool. Airbag24 clears it during the repair.

• Ageing electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

Which of these causes is present only becomes clear from the fault memory evaluation and an examination of the electronics.

How can you tell that the 80A 959 655 L is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In that case airbags and seatbelt pretensioners may not be able to deploy in an emergency. That is a good reason to take the message seriously.

An error message is a clear signal from the system. Therefore have the vehicle checked promptly.

Which vehicles is the 80A 959 655 L fitted in?

The 80A 959 655 L is fitted in these vehicles: Audi Q5 FY (2017-2020), FY Facelift (2020-2024) and FYB Sportback (2020-2024).

Below you will find the list of vehicles recorded for this part number.

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

Compare the part number on the label of the removed unit with this page to make sure it is the correct unit. Also have the fault memory read out. Only the result shows whether the control unit is at fault or whether a plug or a cable is the cause.

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 N.

How does the repair of the 80A 959 655 L work?

Have the fault memory read out and enclose the log before you disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed. At Airbag24, checking, repairing and testing usually take 3–4 working days.

The sequence is mandatory for safety reasons. The control unit may only be removed after the read-out.

Airbag24 checks the unit on the test bench, replaces defective components, clears stored crash data and carries out a function test. You then receive your own unit back.

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 80A 959 655 L get to Airbag24?

You send the control unit 80A 959 655 L to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, the return follows by UPS.

A well-cushioned parcel with the printed repair order inside is sufficient.