Airbag control unit with part number GR6B-57K30-B

What does the airbag control unit GR6B-57K30-B do?

The airbag control unit GR6B-57K30-B performs the evaluation of the restraint system at Mazda. It decides within milliseconds whether the airbags and seatbelt pretensioners of the vehicle must trigger, and monitors all components of this system.

It also detects faults in the system and reports them via the airbag warning light.

After an accident the unit writes crash data and locks itself.

Why does the control unit GR6B-57K30-B fail?

The most common cause of control unit GR6B-57K30-B is crash data stored after an accident, even if no airbag has deployed. Added to this are aged electronic components, cold solder joints, moisture and corrosion at connectors, as well as voltage spikes, for example with a weak battery or after a jump start.

This crash data remains stored when a normal diagnostic tool is used, because the tool does not remove it.

The other causes are general in nature and cannot be classified without examining the unit.

How can you tell that the GR6B-57K30-B is defective?

Signs are the airbag warning light in the instrument cluster staying on permanently or intermittently, a fault message in the instrument cluster, no connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then possibly not deploy.

The airbag warning light in the instrument cluster reports a defect in the control unit directly, so it becomes visible.

If the connection to the diagnostic tool is missing, the cause may lie in the unit or in the wiring.

Which vehicles is the GR6B-57K30-B fitted in?

For Mazda, the control unit with the number GR6B-57K30-B is fitted in these vehicles: Mazda Mazda6 GG (2002-2005), GG Facelift (2005-2007), GY (2002-2005) and GY Facelift (2005-2007).

The overview below shows which vehicles these are:

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

Check the label of the removed unit against the number on this page, then you know it is the right one. Have the fault memory read out beforehand, because this log shows whether the control unit is defective or whether a plug 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 GR6B-57K30-B work?

At Airbag24, checking, repair and testing usually take 3–4 working days. Beforehand have the fault memory read out and the log attached, then disconnect the battery and remove the unit.

Airbag24 checks the submitted control unit on the test bench, replaces defective components and deletes stored crash data. A function test follows, and the own unit goes 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 GR6B-57K30-B get to Airbag24?

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

Enclose the printed repair order with the parcel, and pack the unit shock-proof.