Airbag control unit with part number 959101J400

What is the function of the airbag control unit 95910-1J400?

The airbag control unit with part number 95910-1J400 is an original Hyundai OEM component that serves as the central controller for the passive safety system. It is primarily installed in the Hyundai i20 models of the PB and GB series, processes data from crash sensors, and deploys airbags and seatbelt pretensioners in the event of a collision.

This module, often referred to as the SRS control unit (Supplemental Restraint System), is the critical component responsible for monitoring and controlling all passive safety systems. It continuously analyzes signals from acceleration sensors in the vehicle and, within milliseconds of an impact, determines which restraint systems need to be activated to provide optimal occupant protection.

Why does the control unit 95910-1J400 fail?

The most common reason for repairing the 95910-1J400 control unit is stored crash data following an accident that cannot be cleared via diagnostics. Other typical failures include internal electronic malfunctions leading to complete communication loss, or faults caused by undervoltage or short circuits in the vehicle’s electrical system.

After an airbag deployment, the unit permanently stores crash information. This condition locks the control unit out of service and cannot be reset using standard workshop diagnostic tools.

A total electronics failure renders the control unit inaccessible through the OBD interface. The cause is often defective components on the circuit board, such as those related to power supply or the communication controller.

Even without a crash, the control unit can still fail. Common causes include undervoltage due to a weak battery, short circuits in the vehicle’s wiring, or moisture ingress. Improperly connected airbag simulators or incorrect repair attempts can also result in severe damage.

How do you recognize a defect in the 95910-1J400?

A faulty 95910-1J400 airbag control unit primarily manifests as a permanently illuminated airbag or SRS warning light on the instrument cluster. Often, communication with the control unit via a diagnostic tool is also impossible, and the fault memory contains entries such as “control unit defective.”

The most obvious symptom is the airbag warning light remaining constantly on immediately after starting the vehicle. This indicates a critical system error and typically results in deactivation of the entire restraint system.

Workshops frequently find that no diagnostic connection can be established with the airbag control unit. It fails to respond to queries via the OBD port, making precise fault analysis inside the vehicle impossible.

If fault codes are still readable, messages like “component defective” or specific errors related to individual airbag or seatbelt pretensioner ignition circuits directly point to an internal malfunction of the module.

In which vehicles is the 95910-1J400 installed?

The airbag control unit with part number 95910-1J400 is predominantly used in various model series of the Hyundai i20. At Airbag24, repairing this specific module for the widely distributed European models is a well-established service offering.

At Airbag24, we repair this control unit for the following models, among others:

Hyundai:

i20 (GB series, 2014–2018)

i20 (PB/PBT series, circa 2009–2014)

Repair as the most cost-effective solution for the 95910-1J400

In most cases, repairing the original 95910-1J400 control unit is the most economical and technically sensible option. It is significantly cheaper than purchasing a new part from the manufacturer and avoids compatibility issues that can arise with used units due to incorrect coding or previously stored crash data.

A new Hyundai part comes at a high price and often requires additional programming at a specialized workshop. Used control units carry the risk of originating from a crashed vehicle, having stored an incorrect vehicle configuration, or being themselves on the verge of failure.

The key advantage of repair is that the original, vehicle‑specific control unit remains intact. After refurbishment, it is immediately ready for use without requiring reprogramming of the vehicle—saving both time and additional workshop costs.

How is the 95910-1J400 control unit professionally repaired?

At Airbag24, the 95910-1J400 control unit undergoes a professional, multi‑stage repair process. This begins with a comprehensive initial inspection on the test bench, followed by elimination of the root cause—whether clearing crash data or replacing defective components on the circuit board. Final tests ensure full functionality.

After being sent to Airbag24, the unit first undergoes an initial inspection to verify the reported fault. During this process, the internal fault memory is read out, even if OBD access is no longer available.

Depending on the nature of the fault, repairs are carried out. If crash data has been stored, it is securely erased at the data level. For electronic component defects, faulty parts such as driver ICs, voltage regulators, or connectors on the circuit board are identified and professionally replaced.

Finally, each repaired control unit is tested on a dedicated test bench. All ignition circuits and communication functions are simulated to ensure flawless operation. You receive a 12-month warranty on the completed repair.

What shipping options does Airbag24 offer?

To send your defective control unit to Airbag24, you can either ship it yourself free of charge or arrange a convenient UPS pickup from your preferred location. After repair, returns are shipped back free of charge via UPS as standard. For urgent cases, express and cash-on-delivery options are also available.

For the outbound shipment, you have two choices: send the securely packaged control unit yourself at no cost, or use the convenient UPS pickup service.

Following repair, returns are shipped back free of charge via standard UPS delivery. If you require the part returned especially quickly, you can opt for UPS Express shipping.

In addition, we offer a cash-on-delivery option for both shipping methods. Of course, you can also pick up your repaired control unit directly from our premises.