Airbag control unit with part number 5WK48001

What is the function of the airbag control unit 5WK48001?

The airbag control unit with part number 5WK48001 from Siemens is the central control module for the occupant protection system in the Ferrari LaFerrari F150. It is responsible for analyzing data from acceleration and crash sensors in real time and, in the event of a collision, precisely triggering the necessary restraint systems such as airbags and seatbelt pretensioners.

As a safety-critical component, this module continuously monitors all connected elements of the airbag system. It performs a self-diagnosis at every vehicle start-up to ensure the proper functioning of all sensors, igniters, and wiring harnesses.

If a fault occurs in the system or if so‑called crash data are stored after an accident, the control unit locks itself and activates the airbag warning light on the instrument cluster. This lockout serves safety purposes, as flawless operation can no longer be guaranteed, making professional inspection and repair essential.

Why does the airbag control unit 5WK48001 fail?

The most common reason for failure of the 5WK48001 is the storage of crash data following an accident, which permanently locks the unit. Similarly, internal electronic defects in components can lead to total failure, manifesting as loss of communication or specific error codes. Water damage can also result in irreparable harm.

After a collision—even minor accidents where the airbags did not deploy—the control unit records a crash event. These data cannot be erased using standard workshop diagnostic tools and prevent reactivation of the airbags. The SRS warning light remains illuminated or flashes continuously.

Electronic malfunctions are another typical cause. Defects in processor‑related components, memory modules (EEPROM), or other parts on the circuit board can result in complete loss of communication with the diagnostic tool. Often, an internal, non‑erasable error is then logged in the fault memory.

Alternative part numbers are also known for this control unit, offering similar functionality and experiencing comparable failures. These include numbers 283337, 6H1-003-412, 0 285 001 580, and SI-AB-150F1.

How do you recognize a defect in the 5WK48001 control unit?

A defective 5WK48001 control unit primarily signals its condition through the permanently lit or flashing airbag warning light (SRS light) in the Ferrari’s cockpit. Another clear indication is when the diagnostic tool cannot establish communication with the airbag module or displays an internal, non‑erasable error code.

The most noticeable symptom is the active airbag warning light. It does not turn off after starting the engine, indicating a serious, safety‑relevant fault in the system. In this state, the airbags and seatbelt pretensioners are completely disabled.

Often, the workshop cannot establish communication with the airbag control unit via the OBD port. The module fails to respond to diagnostic requests, making precise on‑site fault analysis impossible and pointing to a severe internal hardware defect.

If communication is still possible, error codes are frequently read out, referencing “internal error” or “crash data stored.” These errors cannot be reset using standard diagnostic tools and require specialized electronics repair.

In which vehicles is the 5WK48001 control unit installed?

The airbag control unit with part number 5WK48001 is a highly specialized component used primarily in Ferrari supercars. It is specifically designed to meet the demanding requirements of the Ferrari LaFerrari F150 model range, produced from 2013 to 2018.

At Airbag24, we repair the 5WK48001 control unit for the following exclusive model:

Ferrari LaFerrari F150 (model years 2013–2018), including the open‑top variant LaFerrari Aperta.

How is the 5WK48001 professionally repaired?

Professional repair of the 5WK48001 at Airbag24 includes precise electronic diagnostics, targeted elimination of the root cause at the component level, and a final functional test. Stored crash data are completely removed, and defective components are replaced, restoring the unit to like-new performance. We provide 2 years' statutory liability for defects on every repair.

Upon receipt of the removed control unit at Airbag24, a systematic analysis begins. Our technicians use specialized diagnostic equipment to determine whether crash data are stored or if there is an electronic defect on the circuit board.

Restoration takes place at the component level. Stored crash data are directly erased from the memory chip. If a hardware defect is present, faulty components such as processors, memory chips, or capacitors are carefully desoldered and replaced with new, qualitatively equivalent parts.

Following repair, each control unit undergoes a comprehensive functional test on a simulation bench. Here, its behavior in the vehicle is simulated to ensure that communication and all activation criteria once again fully comply with the manufacturer’s specifications.

What are the advantages of repair over a new part?

Repairing the original airbag control unit 5WK48001 is a technically and economically superior alternative to an expensive new purchase. You benefit from substantial cost savings of up to 70% and receive your own vehicle-specific unit back in fully functional condition, eliminating the need for time-consuming coding or programming.

A key advantage is cost efficiency. A new part for a vehicle like the Ferrari LaFerrari is extremely expensive. Repair restores full functionality at a fraction of that cost, without compromising safety or quality.

Since the original control unit is refurbished, all vehicle-specific configurations and the original hardware remain intact. This ensures 100% compatibility, and reinstallation becomes a straightforward plug-and-play process, saving both time and costs in the workshop.

Moreover, professionally performed repairs are sustainable and resource-efficient. Rather than disposing of a complex electronic component, it is expertly overhauled, extending its lifespan and reducing environmental impact from electronic waste.