Airbag control unit with part number 44B49060NAS

What is the function of the airbag control unit 44B49060NAS?

The airbag control unit with part number 44B49060NAS is the central control unit (SRS ECU) of the occupant protection system, specifically designed for the Hyundai Tucson model series JM (2004–2010). It processes data from crash sensors and decides within milliseconds whether and which airbags or seatbelt pretensioners need to be deployed to protect occupants in the event of a collision.

As a safety-critical component, it continuously monitors the functionality of all connected components of the restraint system. This includes front, side, and head airbags, seatbelt pretensioners, as well as their associated acceleration and pressure sensors. Any malfunction in the system is immediately detected and signaled to the driver via the airbag warning light.

Due to its central position, the control unit is typically installed in the center tunnel near the gearshift lever to provide optimal protection against external influences. Nevertheless, defects may occur that require professional repair.

Why does the control unit 44B49060NAS fail?

A failure of the control unit 44B49060NAS is usually due to two main causes: permanently stored crash data after an accident, which locks the unit, or internal electronic faults. These include defective components, communication issues over the CAN bus, or damage caused by overvoltage and moisture.

The most common cause is the storage of crash data. After a collision, the control unit permanently writes this information into its memory and locks itself to prevent unintended re‑deployment of the airbags. This condition can only be reset through specialized repair.

In addition, purely electronic faults may occur. Internal defects on the circuit board, such as faulty memory chips or capacitors, result in error codes like 65535, 93F9, or B1000. Likewise, a lack of communication with diagnostic tools due to a CAN‑bus error also indicates a hardware fault within the control unit.

This control unit is also known under related part numbers 95910-2E700, 95910-2E400, 959102S500, and 959102S850, which are used in the same vehicle platform and may exhibit similar fault patterns.

How do you recognize a defect in the 44B49060NAS?

The clearest symptom of a defect in the airbag control unit 44B49060NAS is the SRS warning light that remains constantly illuminated or flashes on the instrument cluster. Additional signs include the inability to access the control unit with a diagnostic tool or specific error messages displayed on the vehicle’s screen.

The airbag indicator light, which fails to turn off after starting the vehicle, signals a serious malfunction. In this state, the restraint system is typically completely disabled, posing a significant safety risk.

Another clear indication is when a workshop cannot establish a connection between its diagnostic equipment and the airbag control unit. The unit no longer responds to requests, making accurate fault diagnosis impossible without removal.

Additionally, messages such as “Refer to the manual” may appear on the display, or in some cases even the engine check light may flash. These symptoms point to communication disruptions within the vehicle’s internal network caused by the defective airbag control unit.

In which vehicles is the control unit 44B49060NAS installed?

The airbag control unit with part number 44B49060NAS, along with its identical variants 95910-2E700, 95910-2E400, 959102S500, and 959102S850, is specifically designed for use in the first generation of the Hyundai Tucson.

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

Hyundai Tucson (model series JM), manufactured from 2004 to 2010

How does the repair of the 44B49060NAS proceed at Airbag24?

Professional repair at Airbag24 begins with the submission of the removed control unit. Following a precise diagnosis on a test bench, depending on the root cause of the fault, stored crash data is erased or defective electronic components are replaced. A final functional test ensures full operability.

After careful removal from the vehicle, the control unit is sent to Airbag24. Our technicians perform a systematic analysis to pinpoint the exact source of the problem—whether it’s a software lock caused by crash data or a hardware defect on the circuit board.

Restoration takes place at the component level. Stored crash data is securely and completely deleted (crash reset). For electronic faults, defective components such as memory chips or capacitors are replaced with genuine parts to restore original functionality and safety.

Subsequently, each repaired control unit undergoes a comprehensive functional test. This ensures that the device operates flawlessly again and correctly controls all systems. We provide 2 years' statutory liability for defects on every repair.

When using a used control unit, it is crucial that it is specific to your vehicle. It must be reset by a qualified technician and re-coded for the new vehicle to guarantee proper functionality. Therefore, repairing the original part is often the safer and simpler solution.