Airbag control unit with part number 27120503

What is the function of Airbag Control Unit 27120503?

The airbag control unit with part number 27120503, also known by OEM number 7088878, is the central control unit for the Supplemental Restraint System (SRS) in the Daewoo Kalos T200. It processes data from collision sensors and determines whether and when airbags and seatbelt pretensioners should be deployed to ensure occupant safety.

This control unit is specifically designed for Daewoo Kalos T200 models manufactured between 2002 and 2011. Its primary task is continuous monitoring of all safety‑related components of the airbag system, ranging from impact sensors and seat occupancy mats to the airbag ignition circuits.

In the event of a collision, the unit analyzes incoming sensor data within milliseconds. Based on the severity and nature of the impact, it precisely and selectively deploys the necessary restraint systems to provide optimal protection for passengers.

Why does Airbag Control Unit 27120503 fail?

The most common reason for repairing control unit 27120503 is the storage of crash data after an airbag deployment, which results in deactivation. Other causes include internal electronic malfunctions such as communication errors, board defects, water damage, or failures caused by external factors like faulty cables and sensors.

Following an accident in which airbags have deployed, the control unit locks itself as a safety precaution and stores so‑called crash data. This lock prevents reuse without professional diagnostics and requires a specialized reset, typically achievable via software.

Internal electronic faults represent another frequent source of failure. These may manifest as complete loss of communication with the diagnostic tool, error messages stored in the fault memory such as “internal error,” or physical damage to components like capacitors or the main circuit board.

The control unit itself is not always the root cause. External factors—such as corroded connectors, broken cables, defective seat occupancy mats, or a weak vehicle battery—can also lead to malfunctions and trigger the airbag warning light.

How do you recognize a defect in control unit 27120503?

A defect in Airbag Control Unit 27120503 almost always presents as a permanently illuminated or flashing airbag warning light on the instrument cluster. Often, communication between the diagnostic tool and the control unit can no longer be established, or specific error codes such as “internal error” or “crash data stored” are read out.

The primary and unmistakable sign is the activated SRS warning light on the dashboard. It alerts the driver that the restraint system is not fully functional and may fail to deploy correctly in the event of an accident, posing a significant safety risk.

An additional clear symptom appears during workshop diagnostics. If the diagnostic tool cannot establish a connection to the airbag control unit via the OBD interface, this indicates a serious internal defect in the control unit.

When error codes explicitly point to an “internal device fault” or “stored collision data,” the root cause is clearly located within the control unit itself, making repair essential to restore system safety.

In which models is control unit 27120503 installed?

The airbag control unit with part number 27120503 was developed specifically for vehicles of the Daewoo brand. It is primarily used in the Kalos T200 series models produced between 2002 and 2011. At Airbag24, we offer professional repair services for this specific control unit.

At Airbag24, we repair control unit 27120503 for the following model:

Daewoo: Kalos (T200 series, model years 2002–2011)

How is control unit 27120503 professionally repaired?

After proper removal and shipment of control unit 27120503 to Airbag24, a thorough diagnosis is first performed. The repair process includes clearing crash data, fixing internal electronic faults, and replacing defective components. Finally, a functional test ensures full operational readiness. We provide a 12‑month warranty on all repairs.

The repair procedure at Airbag24 begins with a detailed incoming inspection. Our technicians read out the fault memory and analyze the hardware for measurable damage to pinpoint the exact cause of the malfunction.

If crash data has been stored, it is safely and completely erased using specialized software, restoring the control unit to its pre‑accident condition. For hardware defects, faulty electronic components on the circuit board are expertly replaced with new, high‑quality parts.

After completion of the repair, each control unit undergoes a comprehensive functional test. This ensures that it processes all signals correctly and that communication with the vehicle functions flawlessly.

Is it worth repairing Control Unit 27120503?

Repairing Airbag Control Unit 27120503 is a highly cost-effective alternative to an expensive new purchase. The cost savings compared to a new part, which often ranges from 700 to 800 euros, are substantial. Additionally, the vehicle’s original configuration is preserved, avoiding time-consuming coding procedures. Airbag24 also provides a 12-month warranty on the repair.

The most obvious advantage is the financial one. Repairing the unit is significantly cheaper than replacing it with a brand-new part from the manufacturer, allowing you to save money without compromising safety.

Since the vehicle-specific original part is repaired, in most cases there is no need for extensive re-coding or programming. After repair, the control unit can often be reinstalled using a simple “plug-and-play” approach, saving both workshop costs and time.

What shipping options does Airbag24 offer?

You can either send your control unit to Airbag24 yourself at no charge, or arrange a convenient UPS pickup from your preferred location. For return shipping, we also provide flexible options: choose between free UPS Standard shipping, faster UPS Express shipping, or self-collection. Both shipping methods are also available with cash-on-delivery.

For outbound shipping, you have two convenient choices: you can ship the package to us yourself, or use UPS’s pickup service, which collects the device directly from your home or workshop.

With free UPS Standard shipping, the repaired control unit typically arrives within one to three business days. If speed is essential, UPS Express shipping is available, ensuring delivery within one to two business days.

Both Standard and Express shipping can be combined with cash-on-delivery. Alternatively, you may pick up your device in person by prior arrangement.