Airbag control unit with part number 959103N200

What is the function of the airbag control unit 95910-3N200?

The airbag control unit 95910-3N200 is the central control module of the occupant restraint system (SRS) in the first-generation Hyundai Equus (LZ/YJ). Manufactured by Delphi or Bosch, it processes data from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners in the event of a collision.

As a core component of passive vehicle safety, this control unit continuously monitors all connected sensors and actuators. It analyzes acceleration and deceleration values to assess the severity of an impact. Based on this analysis, it determines within milliseconds which restraint systems need to be activated to provide optimal protection for occupants.

The device is identified by the Hyundai OE number 95910-3N200. Inside, you’ll find electronics often labeled as Delphi SA3118600-00 or Bosch 0 285 010 747. These part numbers are crucial for accurately diagnosing and repairing the specific hardware architecture.

Why does the control unit 95910-3N200 fail?

The most common causes of failure for the control unit 95910-3N200 include stored crash data after an accident, internal hardware defects in electronic components such as ICs or capacitors, and damage caused by moisture and corrosion. Improper repair attempts can also lead to irreparable secondary damage.

The primary reason for failure is the storage of crash data. After airbags or seatbelt pretensioners have deployed, the control unit locks itself and stores error code B1620 (crash data stored/internal fault). This safety feature prevents further use until the data is professionally reset.

Another frequent cause is internal electronic malfunctions. These arise from aged or burst capacitors, faulty microcontrollers, or damaged driver stages. Overvoltages—such as those caused by jump-starting—can destroy sensitive ICs on the circuit board, resulting in total failure or communication issues.

Moisture is a critical factor, as the control unit is often installed near the center console or under the vehicle floor. Ingressing water leads to corrosion on pins and traces, causing short circuits or open circuits that impair the unit’s functionality.

How do you recognize a defect in the airbag control unit?

A defect in the control unit 95910-3N200 typically manifests as a permanently illuminated airbag or SRS warning light on the instrument cluster. Additional symptoms include specific diagnostic trouble codes like B1620 or B1000 in the fault memory, as well as complete inability to communicate with the control unit during diagnostics.

The most obvious sign is the airbag warning light, which fails to turn off after starting the vehicle. This indicates that the system has detected a critical self-test error and has disabled the occupant restraint systems.

During workshop diagnostics, it often becomes apparent that the control unit is no longer responsive. The diagnostic tool cannot establish communication, suggesting a severe internal hardware fault or a problem with the power supply.

If fault codes can be read, entries such as B1620 (crash data stored/internal fault) clearly point to a lockout following an accident. Error code B1000 (control unit communication error) indicates an internal issue with data processing or communication lines.

In which vehicles is the control unit 95910-3N200 installed?

The airbag control unit with part number 95910-3N200 is specifically designed for the first generation of the luxury sedan Hyundai Equus. Repairing this safety-critical component offers a cost-effective alternative to replacing it with a new unit while preserving the vehicle-specific configuration.

At Airbag24, the control unit 95910-3N200 is professionally refurbished for the following model:

Hyundai: Equus (LZ/YJ generation, model years approximately 1999–2009)

How does the repair of 95910-3N200 proceed at Airbag24?

The repair process at Airbag24 follows a standardized procedure that includes an initial inspection, targeted data processing to erase crash data, fixing hardware defects, and a final functional test on a test bench. This restores full functionality to the safety-critical component.

After sending the removed control unit to Airbag24, a detailed preliminary inspection begins. Technicians perform a visual check for corrosion or fire damage and read out the fault memory if communication is possible. This allows them to distinguish between a pure crash-data entry and an additional hardware defect.

In the next step, data processing takes place. Using specialized lab programmers, direct access is gained to the internal EEPROM or Flash memory. Crash data is precisely restored to factory settings, while all vehicle-specific coding and initialization data are preserved.

If an electronic fault is present, defective components such as capacitors, voltage regulators, or driver ICs are replaced with new, high-quality parts. Cold solder joints are re-soldered, and corroded traces are expertly repaired.

Finally, each repaired control unit is tested on a simulation test bench. Here, vehicle operation is simulated to verify flawless communication and functionality of all internal circuits. Airbag24 provides 2 years' statutory liability for defects on every repair.