Airbag control unit with part number 5WK4 879

What is the function of the Airbag Control Unit 5WK4 879?

The Airbag Control Unit 5WK4 879 from Continental, also known by the Hyundai part number 95910-39000, is the central control unit for the occupant safety system (SRS) in the Hyundai Dynasty LX (1996–2005). It analyzes data from crash sensors and determines whether airbags and seatbelt pretensioners need to be deployed.

As the brain of the safety system, it continuously processes signals from acceleration and yaw rate sensors. In the event of a collision, the unit calculates the severity of the accident within milliseconds and activates the appropriate restraint systems.

Its primary role is to provide optimal protection for occupants. After deployment, it permanently stores crash data to enable analysis of the accident sequence, often necessitating repair of the unit itself.

Why does the 5WK4 879 control unit fail?

The most common cause of failure for the 5WK4 879 control unit is the storage of crash data following an accident. This data locks the device at the hardware level and cannot be erased using standard diagnostic tools. Internal electronic faults in components on the circuit board are also a frequent issue.

When airbags or seatbelt pretensioners have been deployed, a so‑called “crash lock” is set in the control unit’s internal EEPROM memory. This condition is intentionally designed by the manufacturer to prevent reuse without professional repair.

In addition to crash‑data locking, individual electronic components such as capacitors, processors, or memory chips may fail due to age or voltage fluctuations. This results in a complete system malfunction—even if no accident has occurred.

How do you recognize a defect in the 5WK4 879?

A typical sign of a fault in the 5WK4 879 control unit is the airbag warning light that remains illuminated on the dashboard. Often, communication with the control unit via a diagnostic tool is no longer possible, or specific error codes such as B1000 or B1447 appear.

The most obvious symptom is the airbag warning lamp that fails to turn off after starting the vehicle. This indicates a critical fault in the safety system that requires immediate inspection.

In the workshop, the defect often manifests when the diagnostic tester cannot establish a connection with the airbag control unit. The unit does not respond to queries, making fault diagnosis impossible.

When error codes are read, identifiers like B1000 (internal control unit error), B1447, or errors related to side‑impact sensors directly point to a problem within the control unit. Sometimes, airbags may appear blocked even though no specific errors can be retrieved.

In which vehicles is the 5WK4 879 installed?

The Continental airbag control unit with part number 5WK4 879—also listed as Hyundai part 95910-39000—is specifically designed for the Hyundai Dynasty LX models produced between 1996 and 2005. In this model, the unit is typically located in the center console.

At Airbag24, we repair the 5WK4 879 part number for the following model:

Hyundai Dynasty LX (model years 1996–2005)

Proper removal from the center console is crucial. For successful repair, the unit should always be sent in its unopened state.

How is the 5WK4 879 control unit professionally repaired?

Professional repair at Airbag24 begins with an initial inspection of the unopened unit. Next, stored crash data is reset at the chip level, and defective electronic components are replaced with genuine parts. A final functional test ensures full operability, followed by a 12‑month warranty.

After removal from the vehicle, the control unit is securely packaged and shipped to Airbag24. It is important not to open the housing yourself, as this could damage the sensitive electronics and complicate repairs.

Repair work is carried out in a specialized facility. Technicians erase crash data directly from the memory chip and perform a detailed analysis of the circuit board. If any faulty components are identified, they are expertly replaced with new original parts.

Following successful repair and verification, the control unit is fully operational again and can be reinstalled in the vehicle without additional programming or coding (“plug-and-play”). The 12‑month warranty covers all performed services.

What shipping options are available at Airbag24?

You can either send your defective control unit to Airbag24 free of charge or arrange a convenient UPS pickup at your preferred location. For return shipping, you have access to free UPS standard delivery, faster UPS express service, and both options with cash-on-delivery. Self‑pickup is also available.

For sending your item to us, you have two options: You can drop off the package at a post office yourself, or choose the convenient option of having UPS pick it up on our behalf.

When returning your item, we offer several options. UPS Standard shipping is free for you. If you prefer faster delivery, you can select UPS Express shipping.

Both Standard and Express shipping are also available with cash-on-delivery. Alternatively, upon arrangement, you can pick up your repaired control unit directly from our premises.