Airbag control unit with part number 5WK44920

What is the function of the airbag control unit 5WK44920?

The airbag control unit 5WK44920 from Continental is the central control module of the occupant protection system in the Nissan Elgrand E52. Its primary task is to process sensor data so that, in the event of a crash, the airbags and seatbelt pretensioners are deployed precisely and within seconds, thereby protecting the occupants.

As the “brain” of the passive safety system, this module continuously monitors all connected components. These include the various crash sensors positioned at strategic points throughout the vehicle, the airbag modules themselves, and the seatbelt pretensioners.

Under normal operating conditions, the control unit performs continuous self-tests. If it detects a fault in any component, it illuminates the airbag warning light on the instrument panel to alert the driver. In the event of a collision, it analyzes incoming signals and determines which restraint systems need to be activated.

Why does the control unit 5WK44920 fail?

The most common reason for repairing the 5WK44920 control unit is the storage of crash data after an airbag deployment. This data locks the module internally, preventing further use—even if all external accident damage has been repaired. This is a manufacturer‑specified safety feature.

Following a crash in which airbags or seatbelt pretensioners have been deployed, the control unit writes an irreversible data record into its internal memory. This so‑called “crash lock” ensures that the airbag warning light remains illuminated permanently and that error codes can no longer be cleared using conventional diagnostic tools.

In such cases, professional repair is the only cost‑effective solution, as it specifically removes this data lock. It’s important to note that the alternative part number 28556-3JA0A from Autoliv, also installed in the same vehicle model, may be affected by this issue as well.

How do you recognize a defect in the 5WK44920?

The clearest symptom is a persistently illuminated airbag warning light on the dashboard that does not go out even after restarting the engine. Additionally, fault codes stored in the error memory—especially after a crash—cannot be erased with a diagnostic tool.

A typical scenario in the workshop is that, after replacing all deployed airbags and seatbelt pretensioners, the warning light remains active. Attempts to clear the error memory fail because the control unit reports an internal fault indicating “crash data stored” and then locks itself.

Even when no airbags have been deployed, the warning light may indicate an internal malfunction of the control unit. This often manifests as error codes pointing to components like the coil spring, despite the fact that these parts have already been replaced yet the fault persists.

In which models is the 5WK44920 installed?

The Continental airbag control unit with part number 5WK44920 is specifically used in the Nissan Elgrand of the E52 series. An alternative but functionally identical part number for this model is 28556-3JA0A from Autoliv. Both variants are suitable for repair.

At Airbag24, we repair this control unit for the following specific vehicle model:

Nissan Elgrand E52 (model years 2010 to present)

How does the repair of the 5WK44920 work at Airbag24?

The repair process at Airbag24 is standardized: After removal, the control unit is sent in and undergoes a detailed initial inspection. The core of the repair involves professionally erasing the stored crash data and thoroughly checking the hardware. The unit is then tested and fully restored to operational condition.

Once the defective control unit arrives at Airbag24, experienced technicians analyze it. Using specialized equipment, they access the internal memory to safely and completely remove the crash data.

This procedure restores the original functionality of the control unit and provides a significantly more economical alternative to purchasing an expensive new part. With over 20 years of experience and more than 20,000 repairs completed, the highest level of quality is guaranteed.

The repaired control unit is returned ready for installation and can be reinstalled in the vehicle without additional programming (plug-and-play). We offer 2 years' statutory liability for defects on every repair performed.