Airbag control unit with part number KEAD-57K30A

What does the airbag control unit KEAD-57K30A do?

For the restraint system in Mazda, the airbag control unit KEAD-57K30A is responsible: it reads out the crash sensors and determines in an accident which airbags and seatbelt pretensioners fire. Faults appear on the airbag warning light, while the system is checked continuously. After an accident, it stores crash data and locks itself.

In everyday use, this monitoring works unobtrusively in the background.

The control unit stores detected faults in the fault memory.

Why does the control unit KEAD-57K30A fail?

Causes of the KEAD-57K30A: stored crash data is the most common cause, even if no airbag has deployed. Other possible causes are ageing components, moisture on the plugs and voltage spikes. With this control unit, erasing the crash data is often not possible; anyone who wants it erased should contact Airbag24 briefly before sending the unit in.

After the accident, the crash data stays in the memory, even once the car is back on the road. A usual diagnostic tool cannot make it disappear, which is why fault messages appear even when the electronics are sound.

The other triggers include components that age, solder joints that have gone cold, and moisture in the plugs. A voltage surge, for example after a jump start, can also play a part. Only the check shows what is actually present.

How can you tell that the KEAD-57K30A is defective?

Signs on the KEAD-57K30A: the warning light on the dashboard lights up permanently or intermittently, and a fault message comes on as well. The diagnostic tool does not find the control unit, and a fault memory remains. In that case, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

The warning light reports the defect immediately. Have the system checked promptly for that reason.

If the memory stays occupied even after an attempt to erase it, this points to a fault that you should take seriously.

Which vehicles is the KEAD-57K30A fitted in?

The KEAD-57K30A is fitted in these vehicles: Mazda CX-5 KE (2011-2015) and KE Facelift (2015-2017). The list below shows the allocation.

Below are the vehicles that belong to it.

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

You can match the number on the label with this page, which tells you the right unit. Whether the control unit is defective, or a cable or plug is causing the fault, is shown only by the read-out.

For the same vehicles, we also repair control units with the part numbers BELG-57K30, BELG-57K30A, BELG-57K30B, BELG-57K30D, GMN3-57K30, GMN3-57K30A.

How does the repair of the KEAD-57K30A work?

Repair sequence for the KEAD-57K30A: first the fault memory is read out, and the log is then attached to the unit. After that, disconnect the battery and only then remove the control unit. Online, you create the repair order, with which you send in the packed unit; processing at Airbag24 usually takes 3–4 working days.

On the test bench at Airbag24, the unit undergoes an examination; defective components are replaced, followed by a function test. Your own unit is returned to you afterwards.

The steps in this order serve your safety. If you want the crash data erased, 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 KEAD-57K30A get to Airbag24?

Shipping of the KEAD-57K30A: either you send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, you receive the unit back by UPS.

Include the printed repair order in the parcel and pack the unit shock-proof.