Airbag control unit with part number 16020402GD

What is the function of Airbag Control Unit 16020402GD?

The Airbag Control Unit 16020402GD is the central control module for the occupant safety system (SRS) in the Daewoo Kalos T250 (2002–2011). It processes sensor data, deploys airbags and seatbelt pretensioners in the event of a crash, and stores relevant crash data. Equivalent part numbers include 16020402, 96406171, and 7088816.

As the “brain” of the passive safety system, this module continuously monitors signals from acceleration and pressure sensors. In the event of a collision, the control unit determines within milliseconds which restraint systems—such as front or side airbags and seatbelt pretensioners—should be activated to provide optimal protection for occupants.

A critical function is storing crash data. After deployment, a permanent entry is recorded in the unit’s memory, locking the system and illuminating the airbag warning light. This is a safety measure that necessitates inspection and repair of the system.

Why does Airbag Control Unit 16020402GD fail?

The most common cause of failure for Airbag Control Unit 16020402GD is the retention of crash data following an accident. Other causes include internal electronic faults, indicated by error codes such as B1111, as well as external factors like undervoltage or mechanical damage to wiring.

Even after minor collisions, crash data remains permanently stored in the control unit’s memory. This lockout disables the entire airbag system and can only be cleared through specialized repair procedures. Simple replacement often involves high costs and extensive coding work.

Internal electronic defects are another frequent cause. Faulty components, such as capacitors or board-level issues, can lead to complete system failure. A typical error code indicating such an internal fault is B1111 (control unit defective).

External factors can also trigger malfunctions. A weak or depleted vehicle battery may produce undervoltage, causing the control unit to mistakenly interpret this as a fault. Similarly, mechanical damage—such as cable damage caused by seat adjustments—can introduce errors into the system.

How do you recognize a defect in 16020402GD?

A defect in Airbag Control Unit 16020402GD primarily manifests as the SRS airbag warning light remaining steadily illuminated or flashing on the instrument panel. Additionally, the control unit may store specific error codes, such as B1111, in its fault memory, signaling an internal malfunction.

The clearest symptom is the active airbag warning light, alerting the driver that the passive safety system is not operational. In the event of another collision, airbags and seatbelt pretensioners would fail to deploy, posing a significant safety risk.

During workshop diagnostics, specific error codes can often be retrieved. A code like B1111 directly points to an irreparable internal fault requiring professional repair or replacement. Communication issues with diagnostic equipment may also indicate a severe module defect.

In which vehicles is 16020402GD installed?

The Airbag Control Unit with part number 16020402GD, along with its compatible variants 16020402, 96406171, and 7088816, is specifically designed for the Daewoo Kalos T250 and is used exclusively in this vehicle model.

At Airbag24, we repair the Airbag Control Unit with part number 16020402GD for the following model:

Daewoo Kalos (Type T250), manufactured between 2002 and 2011

How does repair proceed at Airbag24?

Repair at Airbag24 begins with the submission of the removed control unit. Following a detailed incoming analysis, crash data is erased, and internal electronic faults are addressed at the component level. Final tests confirm full functionality, after which we provide 2 years' statutory liability for defects.

Once the control unit arrives at Airbag24, a systematic analysis is performed to identify the exact cause of the fault. Error codes are read, and the hardware is inspected for both visible and hidden damage.

The core of the repair process involves eliminating the root cause of the issue. This includes professionally resetting stored crash data and rectifying hardware defects. Defective components on the circuit board, such as capacitors or memory chips, are replaced with high-quality spare parts to restore the device to factory condition.

After successful repair, each control unit undergoes comprehensive functional testing. Only when all functions operate flawlessly is the unit approved for return shipment. Every repaired unit comes with 2 years' statutory liability for defects.