Airbag control unit with part number 4N0959655R

What is the function of the airbag control unit 4N0959655R?

The airbag control unit with part number 4N0959655R is the central control module for the occupant protection system in the Lamborghini Urus Performante. It analyzes data from crash sensors and, in the event of an accident, precisely deploys the airbags and seatbelt pretensioners to ensure occupant safety.

As a component identified as AirbagVW31 H10 2720, this control unit serves as the brain of the passive safety system. It not only manages the front and side airbags but also controls peripheral yet equally important components such as the seatbelt pretensioners, for which part numbers 4N0 980 945 A (left) and 4N0 980 946 A (right), for example, are relevant.

Its precise operation relies on the continuous evaluation of signals from various crash sensors, such as the SideSensor_Df. Based on this data, the unit detects the type and severity of a collision within fractions of a second and determines which restraint systems need to be activated and at what intensity.

What defects occur in the control unit 4N0959655R?

The most common defect is the permanent storage of crash data after an accident, resulting in system deactivation and a lit airbag warning light. Other failures include communication errors with the vehicle network (DTC U0151 00) and internal electronic malfunctions affecting subsystems like seatbelt pretensioners.

Following a crash, the control unit locks itself internally by storing crash event data in a read-only memory area. This is a manufacturer‑specified safety measure designed to prevent the vehicle from being operated with a potentially compromised system. The fault memory can then no longer be cleared using conventional diagnostic tools.

Another well‑known issue is sporadic communication failures, indicated by error code U0151 00—“no communication” or a “Signal_Group_SG_SARA_06 timeout.” Such faults may also occur in conjunction with other systems, for instance, vehicle dynamics sensors, which can manifest as error code C0520 00 (faulty).

In addition, individual electronic components on the circuit board may fail, leading to specific malfunctions in connected parts such as side airbag sensors or seatbelt pretensioners. For successful repair, it is crucial that the control unit be sent in unopened, as this enables accurate diagnosis and restoration.

How do you recognize a defect in the 4N0959655R?

A defect in the 4N0959655R control unit primarily manifests as a permanently illuminated airbag warning light on the instrument cluster. Additionally, the control unit often becomes unresponsive to diagnostic tools, or specific error codes such as U0151 00 (communication error) or C0520 00 (vehicle dynamics sensor) are stored and cannot be cleared.

The clearest indication of a problem is the active airbag warning light. It does not extinguish after starting the vehicle, signaling a serious, safety‑critical malfunction requiring immediate professional inspection.

During workshop diagnostics, the issue often appears as the control unit failing to respond to requests via the OBD interface. Alternatively, error codes may be retrieved, directly pointing to an internal fault or irreversibly stored crash data.

In which vehicles is the 4N0959655R control unit installed?

The airbag control unit 4N0959655R is specifically designed for high-performance vehicles within the Volkswagen Group. At Airbag24, this component is primarily repaired for the Lamborghini Urus Performante models built from 2022 onward.

At Airbag24, the control unit with part number 4N0959655R is professionally refurbished for the following model:

Lamborghini Urus Performante (from model year 2022)

The specific hardware and software configuration (AirbagVW31 H10 2720) is precisely tailored to this model’s vehicle architecture, kinematics, and sensor technology, making repair rather than replacement the optimal solution.

How does the repair of the 4N0959655R proceed at Airbag24?

After sending the unopened control unit to Airbag24, a professional component‑level diagnosis is performed. The repair includes erasing stored crash data and replacing defective electronic components with genuine OEM parts. Following a successful test, the device is returned with 2 years’ statutory liability for defects and is ready for immediate use in the vehicle — coding or programming is not necessary.

The process begins with the proper removal of the control unit, typically located in the center console area. The unit is then securely packaged, unopened, and shipped to Airbag24 along with the completed repair order.

In our workshop, experienced technicians analyze the circuit board using state-of-the-art diagnostic equipment. The focus is on restoring the unit to its original factory condition, which includes safely performing a crash‑reset of the internal memory and, if necessary, precisely desoldering and replacing defective electronic components with genuine OEM parts.

Following repair, the control unit undergoes a comprehensive functional test. The repaired control unit comes back with all vehicle data and is ready for immediate use after reinstallation — coding or programming is not necessary. We provide 2 years' statutory liability for defects on every repair.