Airbag control unit with part number 5Q0959655BQ

What is the function of the airbag control unit 5Q0959655BQ?

The airbag control unit with part number 5Q0959655BQ is the central control module for the occupant protection system in the Audi Q3 of the F3 series (2018–2025). It is responsible for processing sensor data and ensuring the precise, timely deployment of airbags and seatbelt pretensioners in the event of a crash.

As a safety-critical component, this control unit continuously monitors all connected components of the restraint system. These include various crash sensors, airbag modules, seatbelt pretensioners, and the warning light in the instrument cluster. In the event of a collision, the unit determines within milliseconds which safety systems need to be activated to provide optimal protection for occupants.

Therefore, flawless functionality is essential. After deployment or in case of an internal fault, the control unit often disables itself to prevent malfunctions, necessitating professional diagnosis and repair.

Why does the control unit 5Q0959655BQ fail?

A failure of the control unit 5Q0959655BQ is usually caused by the storage of crash data after an accident, which locks the device functionally. Other common causes include internal electronic faults leading to error codes such as B2000 00, as well as water damage or issues with wiring and connectors.

The most frequent reason for repair is the unit’s lockout following an airbag deployment. The control unit permanently stores so‑called crash data and deactivates itself to prevent reuse without proper inspection. This condition is typically logged as an internal fault in the fault memory.

Electronic malfunctions are another typical source of problems. Defective components on the circuit board, cold solder joints, or issues with the internal memory can cause the airbag warning light to remain illuminated. External factors such as moisture from water damage or damaged connectors can also disable the sensitive electronics.

Similar part numbers like 5Q0959655BF or 5Q0959655CC are technically related, often compatible, and exhibit comparable fault patterns, making them generally repairable as well.

How do you recognize a defect in the 5Q0959655BQ?

The clearest symptom of a defect in the control unit 5Q0959655BQ is a permanently lit or flashing airbag warning light in the instrument cluster. Often, the fault memory—especially error code B2000 00—cannot be cleared, or the control unit becomes inaccessible to diagnostic tools.

An active airbag warning light is the primary warning sign. It indicates that the safety system is not fully functional and may fail to deploy correctly in the event of a crash. Ignoring this warning poses a significant safety risk.

During workshop diagnostics, it is often observed that the control unit no longer responds to requests via the OBD-II interface. Alternatively, error codes may be read out, pointing to an internal fault within the control unit itself that cannot be permanently erased.

In which vehicles is the control unit 5Q0959655BQ installed?

The airbag control unit with part number 5Q0959655BQ is specifically designed for models manufactured by Audi. At Airbag24, we specialize in professionally and reliably repairing this component for the vehicle models and series listed in the product description.

At Airbag24, we repair part number 5Q0959655BQ for the following model:

Audi Q3 (F3 series, model years 2018–2025)

How is the control unit 5Q0959655BQ professionally repaired?

At Airbag24, repair of the 5Q0959655BQ begins with a comprehensive analysis upon receipt. Subsequently, stored crash data is professionally reset, error codes are cleared, and defective electronic components are replaced. Following a final functional test and any necessary software adjustments, the refurbished unit is returned to the customer.

After careful removal and secure packaging, please send us the defective control unit. At Airbag24, the unit is first scanned using state-of-the-art diagnostic software to identify the exact cause of the fault—whether it’s a stored crash data record or a hardware defect.

The core of the repair typically involves resetting the crash data, which is possible in approximately 95% of cases. If needed, defective electronic components on the circuit board are replaced with new, high-quality parts. Finally, the unit undergoes a thorough functional test to ensure full operational readiness. We offer a 12-month warranty on every repair.

Is Repairing 5Q0959655BQ Worth It?

Repairing the airbag control unit 5Q0959655BQ offers substantial cost savings of up to 90% compared to a new part, which can cost as much as 750 euros. The repaired unit is fully functional right away and provides an economically and technically sound alternative, backed by a 12-month warranty.

Instead of purchasing an expensive new part, refurbishment allows you to continue using the original component. This not only saves significant costs but also promotes sustainability. The repaired control unit performs just like a new one, ensuring the full safety of the occupant protection system.

What Shipping Options Does Airbag24 Offer?

You can send your control unit to Airbag24 yourself or drop it off free of charge. Alternatively, Airbag24 provides convenient UPS pickup from your preferred location. Returns are free via UPS Standard or optionally via Express, each with cash-on-delivery options.

Outbound Shipping Options:

- Free shipping via your own package to Airbag24

- UPS pickup from your chosen location (convenient and scheduled)

- In-person drop-off at our facility

Inbound Return Shipping Options:

- UPS Standard shipping (free, 1–3 business days)

- UPS Express shipping (1–2 business days)

- UPS Standard shipping with cash-on-delivery (1–3 business days)

- UPS Express shipping with cash-on-delivery (1–2 business days)

- In-person self-collection at our facility