Airbag control unit with part number 992 959 655 C

What does the airbag control unit 992 959 655 C do?

The airbag control unit 992 959 655 C evaluates the crash sensors in the restraint system (SRS) of Audi. In an accident it decides within milliseconds whether airbags and seatbelt pretensioners fire, and it monitors the system continuously while reporting faults via the airbag warning light.

The monitoring stays active as long as the system is in operation. If the unit detects a deviation, it records an entry in the fault memory.

After an accident the control unit stores crash data and locks itself. The next section describes the consequences for the repair.

Why does the control unit 992 959 655 C fail?

The most common cause is crash data stored in the control unit after an accident, even if no airbag has fired. A normal diagnostic tool cannot delete it. Further causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Airbag24 removes stored crash data during the repair, so that it is no longer in the unit afterwards. The other causes concern the electronics and contacts of the control unit.

Aged components and cold solder joints cannot be judged from the outside. Moisture and corrosion attack the plug contacts, and voltage spikes arise, for example, with a weak battery or when a jump-start is given.

How can you tell that the 992 959 655 C is defective?

A defect shows itself when the airbag warning light in the instrument cluster stays on permanently or intermittently. Also possible are an error message in the instrument cluster, a missing connection to the diagnostic tool, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

Start with the airbag warning light in the instrument cluster, because it shows the finding directly. If it stays on or comes back, that points to a fault that appears in the fault memory. The other signs complete the picture.

Which vehicles is the 992 959 655 C fitted in?

The assignment to models depends on the part number. The 992 959 655 C is fitted in these vehicles: Audi RS e-tron GT J9 FW (2020-2024); Audi e-tron GT J9 FW (2020-2024).

The models listed for this part number are shown below:

• Audi RS e-tron GT J9 FW (2020-2024)
• Audi e-tron GT J9 FW (2020-2024)

Compare the part number on the label of the removed control unit with this page. That only establishes that it is the right unit. Having the fault memory read out shows, on the other hand, whether the unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 992 959 655 D, 992 959 655 F, 992 959 655 G, 9J1880204E, 9J1880204F, 9J1880204J.

How does the repair of the 992 959 655 C work?

The repair begins with reading out the fault memory, whose log is attached to the unit. Then disconnect the battery, remove the control unit, create a repair order online and send the unit in. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, renews worn components, deletes the stored crash data and carries out a function test. The unit then 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 992 959 655 C get to Airbag24?

Either you send the control unit as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

Print out the repair order and enclose it, and pack the unit shock-proof.