Airbag control unit with part number EG23-57K30-A

What does the airbag control unit EG23-57K30-A do?

The airbag control unit EG23-57K30-A controls the restraint system (SRS) in Mazda and analyses the signals from the impact sensors. In an accident it decides within milliseconds whether airbags and seatbelt pretensioners are triggered.

While the vehicle is in motion, it monitors the components and reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

In everyday use this function goes unnoticed, yet it is central to the safety of the occupants.

Why does the control unit EG23-57K30-A fail?

The failure of the EG23-57K30-A can be caused by crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it.

Other causes can be more general in nature:

• ageing of the electronics
• dry solder joints on the circuit board
• moisture and corrosion at plug connections
• voltage spikes, for example from a jump start or a weak battery

Airbag24 removes the crash data during the repair, while the other causes are checked and rectified.

How can you tell that the EG23-57K30-A is defective?

Typical signs are an airbag warning light, an error message in the instrument cluster, and a diagnostic tool without connection to the control unit EG23-57K30-A.

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

Such findings are serious, because airbags and seatbelt pretensioners may not trigger in an emergency.

Please have the finding checked early.

Which vehicles is the EG23-57K30-A fitted in?

The EG23-57K30-A is fitted in these vehicles: Mazda CX-7 ER (2006-2009) and ER Facelift (2009-2012).

Here is the overview:

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

Before removal, compare the part number on the label with this list. Also have the fault memory read out, so that it is clear whether the control unit itself is defective or whether a plug or a 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 EG23-57K30-A work?

First read out the fault memory, prepare the log and disconnect the battery. Then remove the unit, create the repair order online and send the unit in well packed. Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test.

Processing at Airbag24 usually takes 3–4 working days.

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 EG23-57K30-A get to Airbag24?

Your control unit EG23-57K30-A can be sent as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS returns it to you.

Pack the unit shock-proof and enclose the printed repair order.