Airbag control unit with part number GW2F 57K30

What does the airbag control unit GW2F 57K30 do?

The airbag control unit GW2F 57K30 is the central control unit of the restraint system (SRS) for Mazda. It evaluates the signals from the crash sensors and decides within a fraction of a second in the event of an accident which airbags and seatbelt pretensioners are triggered. It reports faults via the airbag warning light.

The control unit also monitors the entire restraint system continuously, that is, even when nothing happens. This is not a one-off test but monitoring throughout the whole of operation. After an accident, it stores crash data and locks itself.

Why does the control unit GW2F 57K30 fail?

Most often the cause is crash data stored after an accident, even if no airbag has been triggered. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes. With this control unit, the crash data often cannot be deleted. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

The following causes are possible; only the fault memory shows which one applies.

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or after a jump start

How can you tell that the GW2F 57K30 is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently. This is accompanied by a fault message in the instrument cluster, a diagnostic tool that cannot establish a connection, and a fault memory that cannot be deleted.

With such a finding, the airbags and seatbelt pretensioners may not trigger in an emergency. A fault that appears only intermittently is just as important as one that is shown constantly. Take the warning seriously and have the system checked.

Which vehicles is the GW2F 57K30 fitted in?

The control unit GW2F 57K30 is fitted in these vehicles: Mazda CX-5 KF (2017-2021) and KF Facelift (from 2021). To check whether your unit is one of them, compare the part number on the label.

The vehicles are listed in detail below:

• Mazda CX-5 KF (2017-2021)
• Mazda CX-5 KF Facelift (from 2021)

Compare the part number on the label of the unit with this page. This only confirms that it is the correct unit. Before removing the unit, have the fault memory read out, as only that shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 014 556 Bosch, K123 57K K2 B, K123 57K30 A, K123 57K30 B, K123-57K30, K30F-57K30.

How does the repair of the GW2F 57K30 work?

At the start, the fault memory is read out and the log is enclosed. Then you disconnect the battery and only then remove the control unit. Next, you create a repair order online and pack the unit well. Processing at Airbag24 usually takes 3–4 working days.

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

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 GW2F 57K30 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof, so that it survives transport undamaged.