Airbag control unit with part number 95910-3Z300

What is the function of the airbag control unit 95910-3Z300?

The airbag control unit with part number 95910-3Z300 is the central control module for the occupant protection system in the Hyundai i40 (VF). As an original OEM component, it processes all safety‑related sensor data and activates restraint systems such as airbags and seatbelt pretensioners in the event of a crash.

The module installed in the passenger compartment continuously monitors signals from the acceleration and yaw rate sensors. Upon detecting a collision, it calculates the severity of the impact within milliseconds and determines which airbags and seatbelt pretensioners need to be deployed to provide optimal protection for occupants.

It is specifically tailored to the vehicle architecture of the Hyundai i40 model years 2011–2019 (including the facelift) and ensures the proper functioning of the entire safety system.

Why does the control unit 95910-3Z300 fail?

Failures of the control unit 95910-3Z300 often occur after accidents, when crash data is stored in its internal memory and locks the unit. Other causes include aging, moisture ingress, or failure of specific electronic components—such as the coil spring—which triggers error code B1346.

Following a crash, the control unit stores non‑erasable crash event data. This is a manufacturer‑imposed safety measure that disables the device for further use, requiring replacement or professional repair.

A common secondary cause is a peripheral malfunction, frequently misattributed to the control unit itself. A typical example is a defective coil spring, also known as a slip ring. This disrupts the electrical connection to the driver’s airbag in the steering wheel, resulting in error code B1346 ("High resistance in the driver’s airbag ignition circuit") in the diagnostic system.

Over time, moisture or extreme temperature fluctuations can lead to corrosion on the circuit board or cold solder joints, impairing functionality. In repair contexts, compatible part numbers 95910-3Z100 or 95910-3Z200 are often mentioned, as they exhibit similar failure patterns.

How do you recognize a fault in the 95910-3Z300?

A defect in the airbag control unit 95910-3Z300 primarily manifests as a permanently illuminated airbag warning light on the dashboard. Additionally, access to the control unit via a diagnostic tool is often impossible, complicating fault analysis and pointing to an internal issue.

The most obvious sign is the active airbag warning light that fails to extinguish after starting the engine. This indicates a critical fault in the restraint system, meaning the airbags may not deploy—or may deploy incorrectly—in the event of a crash.

Another typical symptom is complete loss of communication. When a workshop attempts to read the fault memory using a diagnostic device, no response is received from the control unit, suggesting a severe internal hardware failure.

In some cases, communication may still persist, with specific error codes like B1346 being logged. This code directly points to a problem in the driver’s airbag ignition circuit, often caused by a faulty coil spring, yet it nonetheless compromises the overall system functionality.

In which vehicles is the 95910-3Z300 installed?

The OEM airbag control unit with part number 95910-3Z300 was developed by Hyundai specifically for the first‑generation i40 model series (VF). It is used in vehicles from the 2011 model year through the end of the series in 2019, including the facelifted version.

At Airbag24, we repair the 95910-3Z300 control unit for the following Hyundai models:

Hyundai i40 (VF), model years 2011–2015

Hyundai i40 (VF), facelift model years 2015–2019

This component is particularly common in variants such as the Hyundai i40 CW (VF) 1.7 CRDi, but it may also be installed in other engine configurations and trim levels within this model range.

How is the 95910-3Z300 control unit professionally repaired?

Professional repair of the 95910-3Z300 at Airbag24 includes precise electronic diagnostics to pinpoint the fault, erasure of stored crash data, and replacement of defective components at the circuit board level. Final functional tests ensure full restoration of safety functions.

After submitting the removed control unit to Airbag24, our technicians perform a comprehensive incoming inspection to determine whether the fault stems from stored crash data, a hardware defect, or a combination of both.

The actual repair process takes place at the component level. Defective parts—such as sensors, memory chips, or other electronic components on the circuit board—are expertly replaced. If crash data is the root cause, it is securely and completely erased from the device’s internal memory.

After repair, the control unit undergoes rigorous quality inspection and a comprehensive functional test. This ensures it once again communicates flawlessly with the vehicle and correctly manages all safety functions. We provide 2 years' statutory liability for defects on every repair.