Airbag control unit with part number 95940-L5110

What is the function of the airbag control unit 95940-L5110?

The airbag control unit with part number 95940-L5110 is the central control unit (SRS ECU) for the occupant protection system of the Kia K5, DL3 series, from model year 2019 onward. It processes signals from crash sensors to precisely deploy airbags and seatbelt pretensioners in the event of a collision, ensuring occupant safety.

As an original Kia replacement part, this module is precisely matched to the vehicle architecture of the K5 DL3. It continuously monitors all components of the Supplemental Restraint System (SRS), including impact sensors, airbag modules, seatbelt pretensioners, and seat occupancy detection. In the event of a collision, the control unit determines within milliseconds which restraint systems need to be activated and records relevant event data.

Why does the control unit 95940-L5110 fail?

A failure of the control unit 95940-L5110 is usually caused by stored crash data following an airbag or seatbelt pretensioner deployment, which triggers an internal lockout. Other causes include electronic malfunctions due to moisture, short circuits, reverse polarity during jump-starts, or physical damage to components such as chips and capacitors.

The most common reason for repair requests is the storage of crash data. After a collision, the control unit locks itself internally to prevent unintended re‑deployment. This lock is permanent and can only be removed through specialized chip-level intervention. Stored fault codes such as U1XXX or B1XXX indicate this condition.

In addition, external factors can lead to hardware failures. Water damage causes corrosion on pins and circuit traces, resulting in CAN bus issues or complete communication failure. Electrical surges, for example from improper jump-starts, can damage sensitive electronic components like processors or capacitors.

It is important to distinguish this control unit from similar Kia part numbers. While 95940-L5110 is exclusively installed in the K5 DL3, other units—such as 95910-1W400 for the Kia Rio—exhibit related but different fault patterns and error codes, like B1620 or B2500.

How do you recognize a defect in the 95940-L5110?

The primary indication of a defect in the control unit 95940-L5110 is a permanently illuminated or flashing airbag warning light (SRS lamp) in the instrument cluster. Often, the control unit also becomes unresponsive to diagnostic tools ("No communication"), or stored fault codes cannot be cleared.

The most obvious symptom is the active SRS warning light. This indicates that the restraint system is not functioning, posing a significant safety risk in the event of a crash. The light remains on after the vehicle is started.

Another clear sign is the inability to perform diagnostics. Workshop testers (e.g., OBD, BOSCH) receive no response from the control unit, making fault analysis difficult. Messages such as "No communication with the control unit" or "Control unit defective" are typical.

After a collision, the fault codes stored in memory often cannot be erased. This is a direct indication of stored crash data blocking the device. Related fault codes, such as B1347—which points to low resistance in the driver’s airbag circuit—may also appear in the context of a defective control unit.

In which models is the 95940-L5110 installed?

The airbag control unit with part number 95940-L5110 is specifically designed for one vehicle series. At Airbag24, we repair this module for the third-generation Kia K5 (DL3 series) from model year 2019 onward, as it is a dedicated original replacement part for this model.

At Airbag24, we service part number 95940-L5110 for the following vehicle:

- Kia K5 (DL3 series, from 2019 onward)

How does repair work at Airbag24?

Repair of the control unit 95940-L5110 at Airbag24 includes precise diagnosis of electronic components, professional deletion of stored crash data, and replacement of defective parts such as memory chips or capacitors. Following restoration, the unit undergoes a comprehensive functional test and is fully operational again.

Ideally, before removing the control unit, a diagnosis should be performed at a specialized workshop to confirm that the root cause of the issue is indeed the control unit. The diagnostic report should be included with the defective unit when submitting it for repair.

Upon receipt at Airbag24, our technicians analyze the circuit board using specialized measurement equipment. Defective components are identified and replaced with new, high-quality parts. Subsequently, the internally stored crash data is securely and completely erased, restoring the control unit to its factory settings.

Finally, each repaired control unit undergoes a functional test to ensure proper communication and flawless operation. We provide 2 years' statutory liability for defects on the repair performed.