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

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

The airbag control unit EG23-57K30-B controls the SRS restraint system of Mazda. In a collision it evaluates the crash sensors and decides within milliseconds whether airbags and seatbelt pretensioners are triggered.

During everyday operation it carries out constant self-checks. If the unit finds a fault, it shows this via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data and locks itself. The lock only ends with a repair.

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

The most common cause is crash data stored after an accident, even without an airbag having been triggered. A normal diagnostic tool cannot erase this data, so the fault persists.

Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or after a jump start, are also possible causes. Airbag24 erases the crash data during the repair.

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

The airbag warning light in the instrument cluster comes on permanently or intermittently if the EG23-57K30-B has a defect. Added to this are a fault message, a diagnostic tool without a connection to the control unit and a fault memory that cannot be cleared.

As long as these signs persist, airbags and seatbelt pretensioners may fail to trigger in a crash. An early check is therefore sensible.

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

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

The following overview contains the vehicles that are linked with this control unit in our data.

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

Have the fault memory read out before you remove the unit. This makes it clear whether the control unit or a cable is causing the fault. Afterwards compare the part number on the label of the removed unit.

For the same vehicles, we also repair control units with the part numbers 0J14A3906642, 9H05A3906641.

How does the repair of the EG23-57K30-B work?

You have the fault memory read out, disconnect the battery, remove the unit and create a repair order online. Processing at Airbag24 usually takes 3–4 working days.

Then you pack the unit well and send it in, with the record enclosed. At Airbag24 it is examined on the test bench, defective components are repaired and the crash data is erased.

Finally a functional test follows, and then your own unit is 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 EG23-57K30-B get to Airbag24?

You send the control unit EG23-57K30-B as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 brings it back to you by UPS.

The printed repair order goes into the parcel. The unit should be packed shock-resistant.