Airbag control unit with part number 3326245

What is the function of Airbag Control Unit 3326245?

The airbag control unit with part number 3326245 is the central SRS module for the Mazda Mazda6 GG (facelift 2005–2007) and Mazda Atenza GG. It controls and monitors the entire restraint system, including airbags and seatbelt pretensioners, and stores relevant crash data in the event of an accident.

As the brain of the passive safety system, this control unit continuously processes data from various crash sensors throughout the vehicle. In the event of a collision, the module determines within milliseconds which restraint systems—such as the driver’s airbag, knee airbag, or seatbelt pretensioners—should be activated to provide optimal protection for occupants.

This control unit is also known under alternative part numbers GJ6A57K30A or 5WK43763, which are technically compatible. Its typical installation location in the Mazda6 GG is beneath the dashboard or centrally in the passenger compartment.

Why does control unit 3326245 fail?

The most common cause of failure for control unit 3326245 is the storage of crash data after an accident, which triggers an internal hardware lockout. Additional defects arise from aging electronic components, moisture ingress, or pre-existing damage leading to internal hardware malfunctions.

After airbags or seatbelt pretensioners have been deployed, an irreversible entry (crash data) is recorded in the control unit’s internal memory. This lockout is a safety‑critical procedure that prevents further use of a potentially damaged device. The blockage can only be lifted through professional electronic repair.

In addition, age‑related defects may occur in internal components such as processors or memory chips. Moisture caused by leaks in the vehicle or damage resulting from improper repair attempts are also well‑known causes of complete electronic failure.

How do you recognize a defect in 3326245?

A defective 3326245 control unit typically manifests as a permanently illuminated or flickering airbag warning light on the instrument cluster. Often, communication with diagnostic equipment becomes impossible, and specific fault codes such as B1231 or U3000 cannot be cleared.

The primary symptom is the active airbag warning light, indicating that the entire restraint system has been disabled. This poses a significant safety risk, as airbags would not deploy in the event of a crash.

Another clear sign is when the workshop’s diagnostic tool cannot establish a connection to the airbag control unit. The module no longer responds to queries, making precise fault analysis impossible.

Stored fault codes like B1231 or U3000 directly point to an internal malfunction or stored crash data. In some cases, unusual electronic phenomena may also occur, such as the speedometer illumination activating when the vehicle is locked.

In which vehicles is 3326245 installed?

Part number 3326245 is primarily used in Mazda vehicles. Repairing this control unit is especially relevant for models such as the Mazda6 of the GG generation and the identical Mazda Atenza GG, particularly for facelift models from 2005 onward.

At Airbag24, we repair the airbag control unit 3326245 and its equivalent variants for the following models:

Mazda Atenza (GG generation)

Mazda Mazda6 (GG generation, model years 2002–2005)

Mazda Mazda6 (GG generation facelift, model years 2005–2007)

Is repairing 3326245 worthwhile?

Yes, repairing the 3326245 control unit is highly cost‑effective. Compared to a new part, which manufacturers often price between 800 and 900 euros, repair offers substantial savings. A repaired unit is fully functional and provides a sustainable alternative.

By restoring the original component, there is no need for time‑consuming re‑coding or programming at the workshop. The repaired control unit can simply be reinstalled via plug-and-play, saving both time and expense.

With 2 years’ statutory liability for defects on the completed repair, you receive a reliable and safe solution that restores full functionality to the airbag system. While replacing it with used parts—such as part number 3326253—is an option, it usually comes without any guarantee of proper operation.

How is control unit 3326245 professionally repaired?

Professional repair at Airbag24 begins with an initial inspection of the removed 3326245 control unit. Stored crash data is then erased, defective electronic components on the circuit board are replaced, and all functions are verified on a specialized test bench. This ensures full operational capability is restored.

Before removal at a specialized workshop, always generate a diagnostic report with the read-out fault codes. After sending the unit to Airbag24, our technicians perform a detailed analysis to pinpoint the exact cause of the fault.

Repair is carried out at the component level. Stored crash data is erased from the internal memory, and the device’s software is restored to factory settings. Defective hardware components are replaced with new, high-quality parts.

Finally, each repaired control unit undergoes a comprehensive functional test in a simulation environment. This replicates vehicle conditions to ensure that all inputs and outputs operate correctly. We provide 2 years' statutory liability for defects on the repair.