Airbag control unit with part number KGC2-57K30

What does the airbag control unit KGC2-57K30 do?

The airbag control unit KGC2-57K30 is the central control unit of the restraint system (SRS) for Mazda. It evaluates the crash sensors, determines in an emergency within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. The fault information remains in memory until a workshop reads it out.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit KGC2-57K30 fail?

Stored crash data is the most common cause in the KGC2-57K30, even if no airbag has deployed. Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible.

The crash data stays in the unit after an accident. A normal diagnostic tool cannot delete it, and Airbag24 removes it during the repair.

The other causes concern the electrics. Ageing components, wet plugs and cold solder joints belong to them. Voltage spikes occur, for example, with a weak battery or when connecting to a jump-start device.

How can you tell that the KGC2-57K30 is defective?

A defect in the KGC2-57K30 shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Fault messages may accompany it, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• No connection to the diagnostic tool
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. The warning light makes the defect visible, which is why you should take it seriously.

Which vehicles is the KGC2-57K30 fitted in?

The control unit KGC2-57K30 is fitted in these vehicles: Mazda CX-5 KE (2011-2015) and KE Facelift (2015-2017). The safest way to compare is to check the part number on the removed unit against this page.

These vehicles are assigned to the control unit:

• Mazda CX-5 KE (2011-2015)
• Mazda CX-5 KE Facelift (2015-2017)

Comparing the part number on the label only confirms that you have the correct unit. Whether the control unit is defective, or a plug or cable is causing the fault, is shown only by the fault memory. Have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers KA1C-57-K30A, KA1C-57K30, KD45-57K30B, KEAD 57K30 C, KR2757K30A.

How does the repair of the KGC2-57K30 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Processing usually takes 3–4 working days.

Afterwards your 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 KGC2-57K30 get to Airbag24?

You send the control unit as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the control unit shockproof.