Airbag control unit with part number E223-57K30-A

What does the airbag control unit E223-57K30-A do?

The airbag control unit E223-57K30-A controls the restraint system (SRS) of Mazda. It evaluates the crash sensors and, in an accident, determines within milliseconds which airbags and seatbelt pretensioners fire.

The unit monitors the system continuously. If it detects a fault, the airbag warning light in the instrument cluster comes on. After an accident, it stores crash data and then locks itself.

Why does the control unit E223-57K30-A fail?

The most common cause with the E223-57K30-A is crash data stored after an accident, even if no airbag was triggered. Ageing components, dry solder joints, moisture and corrosion at plug connections, and voltage spikes in the vehicle electrical system can also contribute.

Stored crash data remains in the control unit until it is removed during a repair. A standard diagnostic tool cannot erase it. Airbag24 takes care of this during the repair.

The other causes affect the electronics themselves and their connections. Voltage spikes can arise, for example, from a weak battery or a jump start.

How can you tell that the E223-57K30-A is defective?

A defect in the E223-57K30-A can be recognised by the airbag warning light, which stays on permanently or intermittently. Further signs are fault messages, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

Pay particular attention to these signs:

• Airbag warning light permanently or intermittently active
• Fault message in the instrument cluster
• No contact between diagnostic tool and control unit
• Fault memory cannot be cleared

With these signs, the airbags and seatbelt pretensioners may not deploy in an emergency. Therefore have the cause checked promptly.

Which vehicles is the E223-57K30-A fitted in?

The E223-57K30-A is fitted in these vehicles: Mazda CX-7 ER (2006-2009) and ER Facelift (2009-2012).

The models in detail:

• Mazda CX-7 ER (2006-2009)
• Mazda CX-7 ER Facelift (2009-2012)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the right unit. Have the fault memory read out beforehand as well, because only the log 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 0J14A3906642, 9H05A3906641.

How does the repair of the E223-57K30-A work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the E223-57K30-A. Next, create a repair order online and send the unit in well packed.

This sequence protects you during work on the vehicle, because the control unit may only be removed after the memory has been read out and the battery disconnected.

At Airbag24, the unit is checked, defective components are replaced, the crash data is erased and a functional test is carried out. Checking, repairing and testing typically take 3–4 working days. Your unit is then returned 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 E223-57K30-A get to Airbag24?

You send the E223-57K30-A to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, the E223-57K30-A comes back to you by UPS.

Enclose the printed repair order with the parcel. Pack the control unit shockproof so that it arrives undamaged.