Airbag control unit with part number KEAD-57K30E

What does the airbag control unit KEAD-57K30E do?

An airbag control unit KEAD-57K30E keeps the restraint system ready in Mazda: it checks the crash sensors, determines in an accident whether airbags and seatbelt pretensioners are triggered, and shows faults via the warning light. After an accident, it stores crash data and locks itself.

The check takes place constantly, as long as the vehicle is powered up.

Detected faults go into the fault memory, where they can be retrieved during a diagnosis.

Why does the control unit KEAD-57K30E fail?

Causes of the KEAD-57K30E: crash data that remains stored after an accident is the most common cause, even without a deployed airbag. Other causes include ageing components, moisture 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.

A usual diagnostic tool cannot reach this data, so the fault remains visible. Other possible causes:

• ageing of the electronic components
• cold solder joints
• moisture at plug connectors
• voltage spikes from a weak battery or a jump start

How can you tell that the KEAD-57K30E is defective?

Signs on the KEAD-57K30E: the warning light on the instrument cluster lights up permanently or intermittently, accompanied by a fault message. The diagnostic tool does not recognise the control unit, and the fault memory stays occupied. In that case, airbags and seatbelt pretensioners could fail to deploy in an accident.

The warning light shows the defect directly, which makes it the most important sign. Have it checked promptly as soon as it lights up.

A connection that cannot be established with the diagnostic tool, and a fault memory that stays full despite an attempt to erase it, are further clear indications of a fault.

Which vehicles is the KEAD-57K30E fitted in?

The KEAD-57K30E is fitted in these vehicles: Mazda CX-5 KE (2011-2015) and KE Facelift (2015-2017). The list below shows the allocation.

Here you can see which vehicles belong to this part number:

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

Compare the part number on the label of the unit with this page, and you will know it is the right unit. Have the fault memory read out beforehand, because it shows whether the control unit or a plug or cable is defective.

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-57K30E work?

Repair sequence for the KEAD-57K30E: first read out the fault memory and attach the log, then disconnect the battery and remove the control unit. Then create the repair order online and send in the packed unit; processing at Airbag24 takes 3–4 working days as a rule.

Airbag24 replaces defective components, checks the unit on the test bench and carries out a function test. The unit is then returned to you.

During removal, the order of the steps matters, because your safety depends on it. 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-57K30E get to Airbag24?

Shipping of the KEAD-57K30E: you either send the control unit yourself as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

Put the printed repair order into the parcel, and pack the unit shock-proof.