Airbag control unit with part number 80A959655P

What is the function of the airbag control unit 80A959655P?

The airbag control unit 80A959655P is the central control module of the occupant restraint system (SRS). It continuously monitors all relevant components, processes signals from crash sensors, and, in the event of an accident, deploys the necessary restraint systems—such as airbags and seatbelt pretensioners—for specific Audi Q5 models.

As the brain of the entire safety system, this control unit evaluates data from the vehicle’s acceleration and pressure sensors.

In the event of a collision, it determines within milliseconds which airbags and seatbelt pretensioners need to be activated to provide optimal protection for occupants. Another key function is storing so‑called crash data after an accident, which plays an important role in subsequent diagnostics and repairs.

Why does the control unit 80A959655P fail?

The most common reason for needing to repair the 80A959655P is the storage of irreversible crash data following an accident. Other defects are often hardware‑related and manifest as internal malfunctions within the control unit or a complete communication failure that makes diagnosis impossible.

After a crash, crash data is stored in the control unit’s memory. For safety reasons, this data locks the device, requiring professional deletion to restore full functionality of the occupant restraint system.

Besides crash data, internal electronic components may also fail. This can occur due to moisture, such as in cases of water damage, or due to aging-related defects in memory chips or processors. Such hardware failures often render the unit unresponsive.

A further typical symptom is internal errors that can be read via the OBD2 interface but cannot be permanently cleared. These also indicate a defect in the hardware or the control unit’s internal configuration.

How do you recognize a fault in the 80A959655P?

A malfunction of the 80A959655P control unit is primarily indicated by the airbag warning light remaining constantly illuminated on the instrument cluster. Another clear sign is when the control unit becomes unreachable via a diagnostic tool or displays error codes that cannot be cleared.

The most obvious symptom is the persistently lit airbag warning light. It does not turn off after starting the vehicle, signaling a critical system error.

In the workshop, the fault often becomes apparent when no communication with the control unit can be established through the OBD2 interface. The diagnostic tool reports that the control unit is not responding, preventing further troubleshooting of the system.

Sometimes communication is possible, but the fault memory contains entries such as “Internal Error” or “Control Unit Fault.” These errors generally cannot be cleared and require professional electronics repair.

In which vehicles is the 80A959655P installed?

The airbag control unit with part number 80A959655P is specifically used in the second generation of the Audi Q5. This includes both pre-facelift Q5 FY models and later facelift variants, as well as the associated Q5 FYB Sportback models, spanning a broad production period.

At Airbag24, expert repair services for the 80A959655P control unit are offered for the following models:

Audi: Q5 FY (2017–2020), Q5 FY Facelift (2020–2024), Q5 FYB Sportback (2020–2024)

How does the repair of the 80A959655P proceed?

After sending the removed control unit to Airbag24, a professional diagnosis is performed to verify the fault. The repair then focuses specifically on addressing the issue—whether it involves clearing crash data or restoring electronic hardware. Finally, the unit undergoes a functional test and is returned with a 12-month warranty.

For targeted repairs, it is helpful to include a detailed description of the fault along with any existing diagnostic records. Upon receipt and inspection of the unit, a repair quote will be prepared.

Depending on the nature of the damage, repairs at Airbag24 encompass various procedures: professionally resetting stored crash data, repairing hardware defects by replacing faulty components, or cloning the unit’s data onto a replacement device if repair is no longer feasible.

Each repair concludes with a thorough inspection to ensure proper operation of the control unit. A 12-month warranty is provided for all work performed.

What shipping options does Airbag24 offer?

For repairing your control unit, you can either send it to Airbag24 yourself or use the convenient UPS pickup service. For return shipping, Airbag24 provides free standard UPS shipping. For faster delivery, UPS Express shipping is available. Both options can also be combined with cash-on-delivery if needed.

For outbound shipping, you have a choice: you can ship the package yourself or bring it in person at no cost. Alternatively, you can arrange for UPS to pick up the package from a location and on a date of your choosing.

After successful repair, the following return shipping options are available:

Free standard UPS shipping, UPS Express shipping for particularly fast delivery, and both shipping methods can also be combined with cash-on-delivery. A personal pickup of the repaired unit on-site is also possible.