Airbag control unit with part number 285001924

What is the function of Airbag Control Unit 285001924?

The Airbag Control Unit 285001924 is the central control module for the passive safety system in Hyundai H-1 and Starex models. It analyzes data from acceleration sensors to detect a collision and, if necessary, deploys the airbags and activates the seatbelt pretensioners. Its primary role is to ensure occupant safety.

As the “brain” of the restraint system, this control unit continuously monitors all connected components, including the various crash sensors located at the front and sides of the vehicle, the airbag modules themselves, the seatbelt pretensioners, and the seat occupancy detection system.

In the event of a collision, the unit determines within milliseconds which restraint devices need to be activated to provide optimal protection for occupants. After deployment, it stores the relevant crash data internally.

Why does Control Unit 285001924 fail?

The most common reason for requiring repair is the storage of crash data following an accident. This data locks the control unit, preventing further use. Additionally, general internal electronic faults on the circuit board can cause failure, triggering the airbag warning light.

After an accident in which the airbags or seatbelt pretensioners have deployed, the control unit irrevocably writes the crash information into its internal memory. This is a manufacturer‑imposed safety measure that locks the device, necessitating replacement or professional repair.

Besides stored crash data, defects in electronic components on the circuit board can also be the cause. Such hardware malfunctions prevent proper operation of the unit. Similar failure causes are also known in other Hyundai airbag control units, such as part numbers 95910-1J000 and 95900-4A301.

How do you recognize a fault in Control Unit 285001924?

The clearest symptom of a malfunction is the permanently illuminated airbag warning light on the instrument panel. Normally, this light goes out shortly after starting the engine; if it remains on, it indicates a system error. Likewise, the absence of the light upon startup may suggest a fault.

The airbag warning light serves as the driver’s primary diagnostic tool. A persistently lit light means the control unit has detected an issue with one of the system components or an internal defect, potentially rendering the entire restraint system non‑functional in an emergency.

In some cases, additional error messages may appear on the vehicle’s display, pointing to problems with the airbag system. Reading the fault memory at a workshop usually confirms that the control unit itself is the root cause.

In which models is Control Unit 285001924 installed?

The airbag control unit with part number 285001924 is specifically found in various trims of the Hyundai H‑1 and Hyundai Starex models. At Airbag24, we offer professional repair services for this control unit across the vehicle series listed below, providing a cost‑effective alternative to purchasing a new unit.

At Airbag24, we repair Control Unit 285001924 for the following models:

Hyundai H‑1 TQ (2008–2018)

Hyundai H‑1 TQ Facelift (2018–2020)

Hyundai Starex TQ (2008–2018)

Hyundai Starex TQ Facelift (2018–2020)

How does the repair process work at Airbag24?

At Airbag24, the control unit undergoes a standardized repair procedure. Following an initial inspection, stored crash data is erased and the unit is restored to factory settings. If necessary, component‑level repairs are performed. A final test ensures full functionality. We provide 2 years' statutory liability for defects on every repaired unit.

After submitting the removed control unit to Airbag24, our technicians first conduct a thorough diagnosis to identify the exact cause of the fault.

The key step in the repair process is the proper deletion of crash data. If additional hardware components are defective, they are either repaired or replaced on the circuit board. This approach is significantly more economical than buying a new control unit.

Finally, the control unit is tested on a bench to confirm that it communicates flawlessly with all sensors and actuators. The repaired unit can then be reinstalled in the vehicle without any further programming.