Airbag control unit with part number 4H0 959 655 C

Which faults indicate a defective airbag control unit 4H0 959 655 C?

A permanently illuminated airbag warning light, communication issues with diagnostic tools, or error codes and crash data that cannot be cleared are typical signs of a defect in the airbag control unit with part number 4H0 959 655 C. These symptoms point to a serious safety issue that must be addressed immediately.

The most obvious symptom is the continuously lit airbag warning light on the dashboard. Do not ignore this warning signal, as it indicates that the entire airbag system may fail to function correctly in an emergency.

Another common fault is the absence or disruption of communication between the control unit and a diagnostic tool. Even specialized workshops often cannot access the module, making precise fault analysis difficult.

Following a crash, the control unit stores so‑called crash data. For safety reasons, this data often cannot be erased using standard workshop scanners, preventing the system from being reactivated—even after all airbags have been replaced.

What does repairing the control unit 4H0 959 655 C at Airbag24 entail?

At Airbag24, repairing the control unit 4H0 959 655 C focuses on eliminating electronic causes. Our experts professionally reset the unit, securely erase stored crash data, and fix internal defects to restore full functionality and communication.

The core of our service is safely erasing crash data. Unlike basic diagnostic tools, our technicians can unlock the control unit and remove the data, allowing the airbag system to be fully reactivated.

Our repair also includes fixing defects in internal components—such as faults in ignition circuits or in the central electronics of the control unit itself—that trigger error messages.

After completing the electronic repairs, we conduct a comprehensive functional test to ensure the control unit operates flawlessly and can reconnect to the vehicle’s network.

Why is repair a better choice than buying a new control unit?

Repairing the original airbag control unit 4H0 959 655 C is significantly more cost‑effective than purchasing a new one, which costs approximately €727 net. Additionally, you retain the original part coded specifically for your vehicle, avoiding compatibility issues and providing an environmentally friendly alternative.

The financial advantage is substantial. With a repair from Airbag24, you typically save over half the cost compared to a new purchase—without compromising safety or functionality.

An additional key benefit is that your original control unit remains installed in the vehicle. Since it already contains the correct chassis number and coding, there’s no need for time‑consuming and expensive programming procedures required when replacing it with a new or used unit.

By reusing electronic components, you make a valuable contribution to environmental protection. Trust in the proven quality of Airbag24, complete with a warranty on the repair performed.

In which Audi models is the airbag control unit 4H0 959 655 C installed?

The airbag control unit with part number 4H0 959 655 C is a critical safety component in specific high‑performance Audi models. It is particularly used in the Audi R8 of the 42 series (2006–2015) and the Audi S7 of the C7 4G series (2012–2018).

Specifically, this control unit can be found in the following vehicles from the iconic Audi R8 sports car lineup:

• Audi R8 (Type 42), model years 2006–2012

• Audi R8 (Type 42 Facelift), model years 2012–2015

This component is also installed in the sporty luxury sedan, the Audi S7:

• Audi S7 (Type C7 4G), model years 2012–2014

• Audi S7 (Type C7 4G Facelift), model years 2014–2018

How does the repair process work at Airbag24?

The repair process at Airbag24 is designed to be simple and transparent for you. You conveniently place your order through our online store, send us your defective control unit, and our experts handle diagnosis and repair within just a few business days.

Simply ship your removed control unit along with the order confirmation. For outbound shipping, you can either send the package yourself or arrange a convenient UPS pickup at your preferred location for €15.

Upon receipt, our technicians inspect the component and carry out professional repairs. Once the final functional test is successfully completed, we prepare the unit for return shipment to you.

We offer flexible and secure options for returns:

• UPS Standard Shipping (1–3 business days)

• UPS Express Shipping (1–2 business days): +€17.90

• In-store pickup: FREE

Trust Airbag24, the specialist in airbag control units. Submit your repair request now and restore your vehicle’s safety quickly, reliably, and cost-effectively.