Airbag control unit with part number G31F-57K30-A

What does the airbag control unit G31F-57K30-A do?

The airbag control unit G31F-57K30-A is the control unit of the restraint system (SRS) of Mazda. Its task is to read the signals from the crash sensors, decide within milliseconds in an accident on the triggering of airbags and seatbelt pretensioners, and monitor the system continuously. It indicates faults via the airbag warning light.

After an accident it stores crash data and locks itself. Because it evaluates the signals of all sensors, a fault affects the function of the entire system.

Why does the control unit G31F-57K30-A fail?

For G31F-57K30-A, the most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes are aged components, moisture at connectors, cold solder joints and voltage spikes.

Crash data remains stored in the unit, and a standard diagnostic tool cannot remove it. Airbag24 deletes it during the repair.

• ageing of electronic components
• corrosion and wetness at connectors
• solder joints that were made cold
• voltage spikes, for example from a jump start

How can you tell that the G31F-57K30-A is defective?

The airbag warning light in the instrument cluster indicates a defect when it is on permanently or intermittently. Fault messages in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared are added. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

The light is the means by which the system warns the driver, and it stays on as long as the fault is stored.

A fault memory read shows the area in which the system has detected the fault.

Which vehicles is the G31F-57K30-A fitted in?

The airbag control unit G31F-57K30-A is fitted in these vehicles: Mazda Mazda6 GG (2002-2005), GG Facelift (2005-2007), GY (2002-2005) and GY Facelift (2005-2007).

The associated models are listed here:

• Mazda Mazda6 GG (2002-2005)
• Mazda Mazda6 GG Facelift (2005-2007)
• Mazda Mazda6 GY (2002-2005)
• Mazda Mazda6 GY Facelift (2005-2007)

First compare the part number on the label of the removed unit with this page; this ensures that it is the correct unit. In addition, have the fault memory read out. Only then does it show whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 3326245, GJ6A 57 K30 B, GJ6A-57-K30-C, GJ6A-57-K30-D, GJ6A57K30A, GJ6R 57 K30 A.

How does the repair of the G31F-57K30-A work?

For G31F-57K30-A, everything begins with the fault memory: have it read out and enclose the log. Then disconnect the battery and remove the control unit. You create the repair order online and send in the well-packed unit. Testing, repair and function test at Airbag24 usually take 3–4 working days.

The unit is checked at Airbag24, defective components are replaced, and stored crash data is deleted. After that comes a function test, and your own unit is returned to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit G31F-57K30-A get to Airbag24?

You either pack control unit G31F-57K30-A and send it as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

Pack the unit shockproof and place the printed repair order in the parcel.