Airbag control unit with part number 5WY64004

What is the function of Airbag Control Unit 5WY64004?

The airbag control unit with part number 5WY64004, manufactured by Bosch, serves as the central control module for the occupant safety system (SRS) in the SsangYong Rodius A200. It corresponds to OEM number 8625021031 and is responsible for precisely and reliably deploying airbags and seatbelt pretensioners in the event of a crash.

As the “brain” of the safety system, this module continuously processes data from various crash and acceleration sensors throughout the vehicle. It analyzes these signals in real time to determine the severity and nature of an impact.

Based on this analysis, the control unit decides within milliseconds which restraint systems need to be activated. It ensures that the appropriate airbags deploy at the optimal moment to provide maximum protection for occupants.

Why does Control Unit 5WY64004 fail?

A failure of control unit 5WY64004 is most commonly caused by stored crash data following an accident, which locks the device. Other causes include internal electronic component failures, damage due to overvoltage, or issues with wiring and connectors leading to communication breakdowns.

After a collision—even a minor one—the control unit records what’s known as a “crash event.” This data storage is a safety feature designed to prevent reuse without professional diagnostics, effectively locking the system. Clearing this data often requires specialized repair services.

Internal hardware malfunctions are another frequent cause. Electronic components on the circuit board can fail due to aging, vibration, or thermal stress. Faulty wiring or connector issues disrupt communication with sensors or other vehicle systems, also resulting in system failure.

How do you recognize a fault in 5WY64004?

A defect in control unit 5WY64004 primarily manifests as a permanently illuminated or flashing SRS warning light on the instrument cluster. Often, communication with diagnostic equipment becomes impossible, and specific error codes such as 65535, B1000, or 93F9—indicating an internal control unit fault—are logged.

The most obvious warning sign is the airbag indicator light. If it remains steadily lit, the entire restraint system is disabled. In the event of a crash, airbags and seatbelt pretensioners would fail to deploy, posing a significant safety risk and preventing successful TÜV inspection.

Another clear indication is when a workshop’s diagnostic tool can no longer access the airbag system. This complete loss of communication points to a severe internal malfunction of the control unit. Reported CAN bus issues may also stem from a faulty airbag module.

In which vehicles is 5WY64004 installed?

The Bosch airbag control unit 5WY64004 is specifically used in the second-generation SsangYong Rodius (A200), covering model years 2013–2019. At Airbag24, this module—also known under OEM number 8625021031—is professionally refurbished for this particular vehicle model.

At Airbag24, we repair the 5WY64004 control unit for the following dedicated model:

SsangYong Rodius A200 (model years 2013–2019)

Analysis further suggests compatibility with certain diesel models starting from the 2007 model year. Part numbers 86251-31060 and 8625021031 are closely related to this control unit and may refer to the same component.

How is 5WY64004 professionally repaired?

At Airbag24, repairing the 5WY64004 control unit follows a standardized process. After a thorough incoming inspection, stored crash data is erased, and defective electronic components on the circuit board are replaced. Final simulations and functional tests ensure full compliance with manufacturer specifications.

Once the removed control unit arrives at Airbag24, technicians conduct a detailed fault analysis. Using specialized diagnostic tools, all stored errors are read out to pinpoint the exact cause of the malfunction—whether it’s a stored crash event or a hardware defect.

The core of the repair lies in addressing the root cause. Stored crash data is reset at the chip level. If electronic components such as processors, memory modules, or capacitors are damaged, they are expertly replaced.

Finally, the repaired control unit undergoes testing in a controlled environment to verify proper communication and functionality across all deployment circuits. Airbag24 provides 2 years' statutory liability for defects on every repair.

What are the benefits of repairing 5WY64004?

Repairing 5WY64004 offers a significant cost advantage, saving you between 700 and 800 euros compared to purchasing a new part. Additionally, the original Bosch vehicle electronics remain intact, eliminating the need for time-consuming re-coding or programming of the control unit at the workshop.

The financial aspect is the primary benefit. A brand-new airbag control unit from the manufacturer is extremely expensive. Repair represents an economically sensible alternative that protects your budget without compromising safety.

Since the original control unit is repaired, all vehicle-specific data and coding are preserved. After repair, the unit can be easily reinstalled (plug-and-play) and functions immediately, saving you additional workshop costs and time required to program a new module.