Airbag control unit with part number GJ6R 57 K30 B

What does the airbag control unit GJ6R 57 K30 B do?

The airbag control unit GJ6R 57 K30 B controls the restraint system (SRS) for Mazda. It evaluates the signals from the crash sensors, determines within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident, it stores crash data and locks itself.

The unit reports faults via the airbag warning light in the instrument cluster.

Why does the control unit GJ6R 57 K30 B fail?

After an accident, stored crash data are considered the most common cause with GJ6R 57 K30 B, even if no airbag has triggered. Other possible causes include ageing, moisture and voltage spikes. With this control unit, deleting the crash data is often not possible; if you want it deleted, get in touch with Airbag24 briefly before sending the unit in.

The other causes to consider are:

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

A normal diagnostic tool cannot delete the crash data. Which cause applies is only shown by the examination.

How can you tell that the GJ6R 57 K30 B is defective?

You can recognise a defect on the GJ6R 57 K30 B by the airbag warning light in the instrument cluster staying on permanently or intermittently. A fault message in the instrument cluster, a missing connection of the diagnostic tool to the control unit, or a fault memory that cannot be cleared are also signs.

The signs at a glance:

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool without a connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may possibly not deploy. Have the finding checked promptly.

Which vehicles is the GJ6R 57 K30 B fitted in?

The airbag control unit GJ6R 57 K30 B is fitted in these vehicles: Mazda Mazda6 GG (2002-2005) and GG Facelift (2005-2007). To check whether your car belongs to them, use the part number on the removed unit.

These vehicles are on record for this control unit:

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

Comparing the part number on the label of the removed unit with this page only confirms that you have the correct unit. Also have the fault memory read out beforehand, as only it shows whether the control unit is defective or a plug or cable is the cause.

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 GJ6R 57 K30 B work?

When repairing the GJ6R 57 K30 B, you first read out the fault memory, disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the unit, packed well.

Enclose the log of the fault memory with the unit. If you want the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

Airbag24 checks the unit on the test bench, replaces defective components and runs a functional test. Processing usually takes 3–4 working days. Afterwards, you receive your own, repaired unit back.

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 GJ6R 57 K30 B get to Airbag24?

You send the control unit GJ6R 57 K30 B as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the unit shock-resistant.