Airbag control unit with part number 5266564

What is the function of Airbag Control Unit 5266564?

The airbag control unit with part number 5266564 is an original electronic component from Saab, serving as the central controller for the entire Supplemental Restraint System (SRS). It is primarily installed in Saab 900 II NG and Saab 9000 models and replaces the older part number 4619680.

As the heart of the passive safety system, this control unit processes data from the vehicle’s acceleration and crash sensors. In the event of a collision, it makes split-second decisions to deploy airbags and seatbelt pretensioners, protecting occupants.

The unit is specifically designed for the system architecture of the aforementioned Saab vehicles and ensures the proper functioning of all connected safety components, ranging from front airbags and side airbags to seatbelt pretensioners.

Why does control unit 5266564 fail?

The most common cause of failure for control unit 5266564 is the storage of crash data after an accident, which results in the system being locked out. Other reasons include internal electronic defects due to aging, electrical disturbances such as voltage surges, or physical damage to the wiring harness.

After an airbag deployment—such as for the knee or side airbags—the device writes irreversible crash data into its internal memory. This data blocks the unit’s functionality and must be professionally erased to restore full operability.

Electrical disturbances in the vehicle’s electrical system, like voltage spikes, can damage sensitive components on the circuit board. Additionally, age-related wear of electronic parts or cold solder joints may lead to intermittent or permanent malfunctions.

In some cases, the root cause lies outside the control unit itself. Defective connectors, broken wires in the SRS wiring harness, or incorrect wiring can also produce symptoms that appear to originate from the control unit. A professional diagnosis is therefore essential. Technically, this unit is also compatible with the Bosch variant 0265001653.

How do you recognize a defect in control unit 5266564?

A typical sign of a defect in control unit 5266564 is a continuously illuminated or flashing airbag warning light on the instrument cluster. Often, the control unit can no longer be accessed by diagnostic equipment, complicating troubleshooting.

The most noticeable symptom is the active SRS or airbag warning light. It may either remain constantly lit or flicker intermittently, often indicating an emerging electronic fault.

Another clear indication is the lack of communication with the control unit. When attempting to read the fault memory, the workshop receives no response from the device. Common error codes pointing to an internal defect include B1000, 65535, 93F9, or general CAN bus errors.

Rarer but specific to this component are thermal issues: the control unit may completely fail when overheated. Other unusual electrical phenomena, such as a malfunctioning clock or a speedometer illumination that activates upon locking the car, can also stem from a defect in this unit.

In which vehicles is control unit 5266564 installed?

The airbag control unit 5266564 was developed specifically for various Saab models. It is mainly used in the Saab 900 II NG series from 1993 to 1998, as well as in certain variants of the Saab 9000.

At Airbag24, we repair control unit 5266564 for the following Saab models:

Saab 900 II NG (model years 1993–1998)

Saab 900 S, Saab 900 SE, Saab 900 Turbo, Saab 900 Talladega

Saab 9000 Aero, Saab 9000 Griffin

How is control unit 5266564 professionally repaired?

Professional repair of control unit 5266564 involves targeted correction of the underlying electronic issue. Following an initial inspection, defective components are replaced, stored crash data is erased, and the circuit board is restored before a final functional test confirms full operability.

Upon submission to Airbag24, the control unit undergoes a comprehensive analysis. Using specialized diagnostic tools, technicians read the internal fault memory to pinpoint the exact source of the problem—whether it’s an internal component failure, a voltage issue, or stored accident data.

The actual repair takes place at the component level. Defective electronic parts are desoldered and replaced with new, high-quality components. Stored crash data that locks the system after an accident is completely and safely removed from memory. Any damage to the circuit board, such as that caused by voltage surges, is also addressed.

Finally, the repaired control unit is tested on a test bench to verify the correct operation of all circuits and flawless communication. We provide 2 years' statutory liability for defects on every repair.