Airbag control unit with part number 4G0959655B

What is the function of the airbag control unit 4G0959655B?

The airbag control unit with part number 4G0959655B is the original OEM safety module for various Lamborghini Huracán models. Manufactured by supplier Bosch for the Volkswagen Group, it is responsible for monitoring all crash sensors and precisely triggering the airbags and seatbelt pretensioners in the event of a collision.

As a central component of the passive safety system, this control unit continuously processes data from the vehicle’s acceleration and pressure sensors. It analyzes these signals in real time to determine the severity and type of impact.

Based on this analysis, the unit makes split-second decisions about which restraint systems need to be activated—these include front, side, and head airbags, as well as pyrotechnic seatbelt pretensioners—to provide optimal occupant protection. Bosch’s manufacturing ensures compliance with the highest quality and safety standards.

Why does the control unit 4G0959655B fail?

A failure of the 4G0959655B control unit is often caused by stored crash data following an accident, which locks the system. Additionally, general electronic malfunctions in internal components can lead to operational issues. It is important to distinguish this part from similar part numbers such as 4G0959655C, which applies to older models.

The most common reason for requiring repair is the storage of crash data. After the airbags or seatbelt pretensioners have deployed, the control unit locks itself for safety reasons and must be professionally reset. A simple replacement often involves high costs for a new part.

Besides crash-data locking, internal hardware defects may also occur. These include faults in processors, memory modules, or other electronic components on the circuit board, leading to total failure or intermittent errors. Such defects are resolved through expert diagnosis and component-level repairs.

During diagnosis, it is crucial to verify the exact part number. There is a similar variant, 4G0959655C, which may be installed in older or alternative Huracán versions. Furthermore, certain models like the Huracán STO use an alternative OEM part number, 4G8880204D, as a DASH‑module airbag control unit.

How do you recognize a defect in the 4G0959655B?

A defect in the 4G0959655B airbag control unit primarily manifests as a permanently illuminated airbag warning light on the instrument cluster. Additionally, during diagnostics via the OBD port, the control unit may become unreachable or store specific internal error codes.

The clearest indication of a problem in the airbag system is the red or yellow airbag warning light. If this light remains on after starting the engine, it signals a fault that could compromise occupant safety. In this state, the restraint system may not function properly.

In the workshop, a defective control unit often shows communication issues: a diagnostic tool cannot connect to the airbag module or reads error codes indicating an “internal control unit fault.” This confirms that the root cause lies within the device itself, rather than external components such as sensors or wiring.

In which vehicles is the 4G0959655B installed?

The 4G0959655B airbag control unit is the original OEM component for numerous Lamborghini Huracán models. Compatibility covers nearly the entire model range—from early LP variants through Performante and Evo models to newer Tecnica and STO versions.

At Airbag24, we repair the 4G0959655B control unit for the following Lamborghini Huracán models:

Lamborghini Huracán LP580-2 (2015–2020), Lamborghini Huracán LP640-4 Performante (2017–2019), Lamborghini Huracán LP630-4 Evo (2019–2023), Lamborghini Huracán LP640-4 Performante Spyder, Lamborghini Huracán STO (2021–2024), Lamborghini Huracán Spyder, Lamborghini Huracán Evo Spyder (2019–2024), Lamborghini Huracán Evo RWD (2020–2023), Lamborghini Huracán Evo RWD Spyder (2020–2023), and Lamborghini Huracán Tecnica (2022–2024).

How is the 4G0959655B repaired?

Professional repair of the 4G0959655B at Airbag24 includes a precise initial inspection, elimination of the root cause—such as clearing crash data or replacing faulty components—and a final functional test. We provide 2 years' statutory liability for defects on every repair performed.

After careful removal from the vehicle, the control unit is sent to Airbag24. Our technicians first conduct a comprehensive analysis to identify the exact cause of the malfunction, ensuring that all defects are detected and resolved.

The actual repair process focuses on eliminating the identified defects. This may involve safely and completely erasing crash data from the internal memory or repairing the electronics at the component level, using only high-quality replacement parts.

Upon completion of the repair, the control unit undergoes rigorous testing on our test benches. Here, flawless communication and functionality of all system components are simulated to ensure full operational readiness before the device is returned to you.