Airbag control unit with part number GJ6R-57-K30-D

What does the airbag control unit GJ6R-57-K30-D do?

The airbag control unit GJ6R-57-K30-D is the central control unit of the restraint system (SRS) for Mazda. It analyses the signals from the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After a crash it stores crash data and locks itself.

The control unit works in the background and normally goes unnoticed. It reports faults via the airbag warning light in the instrument cluster. In everyday driving you will notice nothing as long as the display stays inconspicuous.

Why does the control unit GJ6R-57-K30-D fail?

The most common cause with the GJ6R-57-K30-D: crash data stored after a crash, even if no airbag has triggered. Other causes include aged electronic components, cold solder joints, moisture and corrosion at connectors, and voltage spikes, for example from a weak battery or jump-starting. On this control unit, deleting the crash data is often not possible; if you want it deleted, contact Airbag24 briefly before sending the unit in, and Airbag24 will then check the part number.

Electronic components can age over time. Moisture and corrosion can attack connectors, and a cold solder joint can cause intermittent faults.

Voltage spikes, for example from a weak battery or from jump-starting, put additional strain on the electronics.

Which of these causes applies to your unit cannot be determined from this page alone.

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

A defect in the GJ6R-57-K30-D shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. Other signs are a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

• The airbag warning light in the instrument cluster lights up permanently or intermittently.
• The instrument cluster displays a fault message.
• The diagnostic tool cannot connect to the control unit.
• The fault memory cannot be cleared.

If these signs appear, the airbags and seatbelt pretensioners may fail to trigger in an emergency. Have the warning light checked promptly.

Which vehicles is the GJ6R-57-K30-D fitted in?

The control unit GJ6R-57-K30-D is fitted in these vehicles: Mazda Mazda6 GG (2002-2005) and GG Facelift (2005-2007). You can tell whether your vehicle is one of them from its make, model and year of manufacture.

These vehicles are listed in detail:

• 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. Also have the fault memory read before removal, because only that shows whether the control unit is defective or whether a connector 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-D work?

First have the fault memory read out and attach the log to the unit, then disconnect the battery and only then remove the control unit GJ6R-57-K30-D. Next, create a repair order online and send the unit in well packed. Airbag24 checks it on the test bench, replaces defective components and carries out a functional test; processing there usually takes 3–4 working days.

Your own unit is then sent back to you.

If you want the crash data deleted, 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 GJ6R-57-K30-D get to Airbag24?

You send the control unit GJ6R-57-K30-D in as a parcel, or you 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. Make sure the unit sits firmly in the parcel and cannot shift.