Airbag control unit with part number 80A959655AE

What is the function of the airbag control unit 80A959655AE?

The airbag control unit with part number 80A959655AE is the central control module for the passive safety system in models such as the Audi Q5 FY. It processes data from crash sensors and determines whether to deploy airbags and seatbelt pretensioners, thereby protecting occupants in the event of a collision.

As the heart of the restraint system, this Bosch‑manufactured control unit continuously communicates with all relevant sensors in the vehicle. In the event of a collision, it analyzes the severity of the impact within milliseconds and activates the necessary pyrotechnic components. It also constantly monitors the functionality of the entire airbag system and reports faults via the warning light on the dashboard.

Why does the control unit 80A959655AE fail?

A failure of the control unit 80A959655AE is usually due to internal hardware defects or stored crash data. Often, individual electronic components such as capacitors on the circuit board are defective. Following a crash, the unit frequently locks internally and stores error code B2000.

The most common cause of permanent failure is faulty components on the printed circuit board. Rather than a complete breakdown of the device, a single component may fail, disrupting the operation of the entire system. A targeted repair at the component level is therefore the most technically sound and cost-effective solution.

Another typical cause is the storage of crash data after an airbag deployment. The control unit enters a locked state, often indicated by error code B2000, which cannot be cleared using standard OBD2 diagnostic tools. In these cases, a special reset of the internal memory is required.

This control unit is also known under reference numbers 80A959655N or A2C96376516. The fault patterns and repair methods are identical for these variants.

How do you recognize a defect in the 80A959655AE?

A defective airbag control unit 80A959655AE primarily manifests as a permanently illuminated airbag warning light on the instrument cluster. The error memory often contains code B2000. In some cases, communication with the control unit is no longer possible.

The clearest symptom is the persistently lit airbag warning light on the dashboard. It does not extinguish after starting the vehicle, indicating a system‑relevant, stored fault.

During diagnosis with a workshop tester, error code B2000 is frequently read out, directly pointing to an internal fault or the need to reset the control unit.

An additional serious sign is a complete loss of communication. The control unit becomes unreachable via the OBD2 interface, making normal diagnostics impossible and suggesting total failure.

Rarely, pixel defects in connected displays can also indicate a problem with the control unit, as it is networked with other systems in the vehicle.

In which vehicles is the 80A959655AE installed?

The airbag control unit 80A959655AE is specifically designed for various models in the Audi Q5 series. At Airbag24, we repair this control unit for the Audi Q5 FY, the FY facelift model, and the Q5 FYB Sportback, produced from model year 2017 onward.

At Airbag24, professional repairs are offered for vehicles equipped with this control unit. These include, in particular, the following Audi models:

Q5 FY (model years 2017–2020) Q5 FY Facelift (model years 2020–2024) Q5 FYB Sportback (model years 2020–2024)

The repair process is also applicable to the sporty SQ5 variants of these series, which may use related part numbers such as 80A959655Q.

How is the 80A959655AE professionally repaired?

At Airbag24, repairs follow a standardized procedure. After submission, the 80A959655AE control unit is inspected, defective components on the circuit board are replaced, and stored crash data is erased. A final test ensures full functionality, backed by a 12‑month warranty.

Once the removed control unit arrives at Airbag24, technicians perform an initial inspection to verify the reported fault. This includes checking communication and reading out the error memory.

Subsequently, repairs are carried out at the component level. Specialists open the device and replace defective parts such as capacitors or other electronic components on the circuit board. This is the most sustainable approach, as intact parts remain in place.

A key step is erasing the crash data and resetting the internal error memory, especially when error code B2000 is present. This restores the original functionality of the device.

Finally, the repaired control unit is tested under real-world conditions on a specialized test bench. Only after passing this test is it approved for return shipment. We provide a 12-month warranty on every repair.

What shipping options does Airbag24 offer?

For a hassle-free process, you can send your defective control unit to Airbag24 free of charge or arrange a paid UPS pickup. For return shipping, both free UPS standard delivery and faster express options—including cash-on-delivery—are available.

For outbound shipping, you have two choices: you can ship the package yourself at no cost, or book a convenient UPS pickup from your preferred location.

For return shipping, several options are available:

UPS standard delivery is free of charge. Alternatively, you can opt for faster UPS Express delivery. Both options also support cash-on-delivery if you prefer to pay upon receipt.

In addition, you have the option to pick up the repaired control unit directly from our premises.