Airbag control unit with part number GK2E 57 K30 B

What does the airbag control unit GK2E 57 K30 B do?

The airbag control unit GK2E 57 K30 B is the central control unit of the restraint system (SRS) for Mazda. It evaluates the signals from the crash sensors and, in the event of an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

It also monitors the system continuously and reports faults via the airbag warning light in the instrument cluster. It is one of the safety-relevant control units in the vehicle, because it has to react without any loss of time in an emergency.

After an accident, it stores crash data and locks itself.

Why does the control unit GK2E 57 K30 B fail?

The most common cause is that the GK2E 57 K30 B stores crash data after an accident, even if no airbag has deployed. Other causes include aged components, corrosion on plug connections and voltage spikes. With this control unit, deleting the crash data is often not possible; if you would like it deleted, please contact Airbag24 briefly before sending it in.

A normal diagnostic tool cannot delete the crash data. Only the evaluation of the fault memory shows whether one of these causes is present.

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

How can you tell that the GK2E 57 K30 B is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when the GK2E 57 K30 B is faulty. In addition, there is an error message in the instrument cluster, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

Even an intermittent light indicates a fault. In that case, airbags and seatbelt pretensioners may not deploy in an emergency.

Which vehicles is the GK2E 57 K30 B fitted in?

The control unit GK2E 57 K30 B is intended for vehicles of the Mazda brand. It is fitted in these vehicles: Mazda Mazda6 GG (2002-2005) and GG Facelift (2005-2007).

The individual vehicles are shown in this list:

• 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 correct unit. If the numbers do not match, clarify this before sending the unit in. Also have the fault memory read out before you remove the unit. Only this shows whether the control unit is defective or a connector or cable is the cause. A defect cannot be confirmed before the fault memory has been read.

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 GK2E 57 K30 B work?

For the repair of the GK2E 57 K30 B, first have the fault memory read out and include the report in the parcel. Then disconnect the battery, remove the control unit, create a repair order online and send in the securely packed unit. Processing at Airbag24 usually takes 3–4 working days.

This order is there for safety. Airbag24 checks the unit on the test bench, replaces defective components and carries out a function test. Then your own unit is returned to you.

If you would like the crash data deleted, please contact 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 GK2E 57 K30 B get to Airbag24?

You send the GK2E 57 K30 B in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the unit so that it is shockproof.