Airbag control unit with part number 95910-3A900

What is the function of the airbag control unit 95910-3A900?

The airbag control unit 95910-3A900 is the central control module of the passive safety system in the Hyundai Trajet FO. It is responsible for evaluating signals from acceleration and crash sensors and, in the event of a collision, precisely triggering the airbags and seatbelt pretensioners within milliseconds.

As the “brain” of the restraint system (SRS), this module continuously monitors all connected components—from impact sensors located at the front and sides of the vehicle to the airbag modules and seatbelt pretensioners—ensuring that the system remains fully operational when needed.

If an impact exceeding a predefined threshold is detected, the control unit processes this information in real time and sends the ignition command to the appropriate pyrotechnic charges. This procedure guarantees optimal protection for vehicle occupants.

Why does the control unit 95910-3A900 fail?

The most common cause of failure for the control unit 95910-3A900 is the storage of crash data after an airbag deployment. Other defects include internal hardware malfunctions that can result in total failure or complete loss of communication with diagnostic equipment, necessitating repair.

Following a crash in which airbags or seatbelt pretensioners have deployed, the unit permanently stores crash data in its internal EEPROM memory. This is a manufacturer‑specified safety measure that locks the control unit, preventing further use. A professional repair can reset this state and restore full functionality to the module.

Another typical issue is a complete breakdown in communication: the control unit becomes unreachable via the diagnostic interface. The root cause often lies in hardware faults on the circuit board, such as problems with processors, memory chips, or the internal power supply.

In some cases, the unit experiences total failure, indicated by a constantly illuminated airbag warning light even without any prior accident. This suggests the failure of individual electronic components due to aging or thermal stress.

How do you recognize a defect in the 95910-3A900?

A defect in the control unit 95910-3A900 primarily manifests as a persistently lit airbag warning light on the instrument cluster. Another clear sign is when the control unit cannot be accessed through the OBD interface and fails to communicate with diagnostic equipment.

The most obvious symptom is the airbag warning light on the dashboard that does not turn off after starting the engine. This indicates a serious fault in the restraint system, rendering it non‑functional in the event of a crash.

Specialized workshops often find they cannot establish a connection between their diagnostic tool and the airbag module. No error codes can be read, complicating troubleshooting and strongly suggesting an internal malfunction within the control unit itself.

It is crucial to have the control unit inspected at a specialized workshop before removal to rule out issues with other components, such as sensors, wiring, or the coil spring. If possible, an inspection report should be included with the repair submission.

In which vehicles is the control unit 95910-3A900 installed?

The airbag control unit with part number 95910-3A900 was specifically developed for the Hyundai Trajet. Airbag24 provides repair services for both generations of this model affected by this type of control unit, offering a targeted solution for this vehicle.

At Airbag24, the 95910-3A900 control unit is repaired for the following specific Hyundai Trajet model variants, backed by over 20 years of experience:

Hyundai Trajet FO (model years 1999–2004)

Hyundai Trajet FO Facelift (model years 2004–2008)

How does the repair of the 95910-3A900 proceed at Airbag24?

At Airbag24, each submitted 95910-3A900 control unit undergoes a professional initial inspection. The repair process includes the proper erasure of crash data and the restoration or replacement of defective internal components. Following successful repair and a final test, the unit is returned with 2 years’ statutory liability for defects.

The process begins after the control unit has been carefully removed from the vehicle. Please send the module securely packaged along with the completed repair form to Airbag24.

Upon receipt, technicians analyze the unit. If crash data is stored, the memory chip is professionally restored to factory settings. In cases of hardware defects, faulty components on the circuit board are identified and replaced with new, high‑quality parts.

Each refurbished control unit undergoes a final functional test. This repair represents a significantly more cost-effective and sustainable alternative to purchasing an expensive new part, backed by 2 years’ statutory liability for defects.