Airbag control unit with part number GM9E 57 K30

What does the airbag control unit GM9E 57 K30 do?

The airbag control unit GM9E 57 K30 is the central control unit of the restraint system (SRS) of Mazda. It evaluates the signals from the crash sensors, decides within milliseconds in the event of an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident, it stores crash data and locks itself.

If the electronics detect a fault, they report it via the airbag warning light in the instrument cluster. For diagnosis, the fault memory can be read out through a port on the vehicle.

Why does the control unit GM9E 57 K30 fail?

The most common cause with the GM9E 57 K30 is crash data stored after an accident, even if no airbag has deployed. On this control unit, deleting the crash data is often not possible; if you would like it deleted, get in touch with Airbag24 briefly before sending the unit in. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

A standard diagnostic tool cannot remove the crash data, and Airbag24 then checks the part number before the unit is sent in. The other causes tend to act over a longer period: moisture and corrosion disrupt plug connections, and voltage spikes, for example from a weak battery, put strain on the electronics.

How can you tell that the GM9E 57 K30 is defective?

A defect in the GM9E 57 K30 is mainly recognised by the airbag warning light in the instrument cluster staying on permanently or intermittently. A fault message also appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In that case, the airbags and seatbelt pretensioners may not deploy in an emergency.

If the light is on, have the system checked promptly, even if the vehicle otherwise drives normally.

Which vehicles is the GM9E 57 K30 fitted in?

The airbag control unit GM9E 57 K30 is fitted in these vehicles: Mazda Mazda6 GG (2002-2005) and GG Facelift (2005-2007).

Here is an overview of the assignment:

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

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Whether the control unit itself is faulty or a connector or cable is the cause will only become clear once the fault memory has been read out, which you should have done beforehand.

For the same vehicles, we also repair control units with the part numbers 3326245, 5WK43763, 5WK43764, GJ6A57K30A, GS3L-57-K30, GSYL57K30.

How does the repair of the GM9E 57 K30 work?

First, have the fault memory of the GM9E 57 K30 read out and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the well-packed unit. At Airbag24, processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and carries out a function test. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in. Your own unit is then sent back 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 GM9E 57 K30 get to Airbag24?

You send the control unit GM9E 57 K30 in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS. Put the printed repair order into the parcel and pack the unit shockproof.

The repair order in the parcel helps to assign the unit correctly.