Airbag control unit with part number NA2C-57K30

What does the airbag control unit NA2C-57K30 do?

The airbag control unit NA2C-57K30 is the central control unit of the restraint system (SRS) in Mazda. It evaluates the crash sensors, decides in the event of a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

After a crash, the control unit stores crash data and locks itself. It reports faults in the system via the airbag warning light in the instrument cluster.

Therefore, any fault in the control unit has a direct effect on the restraint system.

Why does the control unit NA2C-57K30 fail?

The control unit NA2C-57K30 most commonly fails because of crash data stored after an accident, even without an airbag having deployed. A normal diagnostic tool cannot erase them. Other possible causes are aged components, cold solder joints, moisture and corrosion, and voltage spikes.

Crash data is the most important single cause, but not the only one. The control unit creates it when it registers an accident.

Overall, the following causes come into consideration:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the NA2C-57K30 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as a problem occurs in the control unit NA2C-57K30. In addition, an error message appears in the instrument cluster, and a diagnostic tool finds no connection to the control unit.

The fault memory also cannot be cleared. In an emergency, airbags and seatbelt pretensioners may therefore fail to deploy.

If the light is on, have the system checked promptly.

Which vehicles is the NA2C-57K30 fitted in?

The airbag control unit NA2C-57K30 is fitted in these vehicles: Mazda MX-5 ND (from 2015). Before removal, use the list to check whether your vehicle is affected.

Here you will find the vehicles for which Airbag24 holds this part number.

• Mazda MX-5 ND (from 2015)

Compare the part number on the label with this page to confirm that you have the correct unit. For the cause, however, the fault memory is decisive, which you should have read out before removal.

For the same vehicles, we also repair control units with the part numbers 0 285 014 161 Bosch, N243 57K K2 C, N243 57K30 A, N243 57K30 C, N243 57K30 D, N243-57-K30G.

How does the repair of the NA2C-57K30 work?

Processing at Airbag24 takes 3–4 working days. You have the fault memory of the control unit NA2C-57K30 read out, enclose the log, disconnect the battery and only then remove the unit.

Then create a repair order online and send in the well-packed unit. On the test bench, Airbag24 examines the unit, repairs damaged components, erases the stored crash data and tests the function. Your own 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 NA2C-57K30 get to Airbag24?

You either send the NA2C-57K30 yourself as a parcel or have it collected by UPS for an extra charge. Airbag24 sends the repaired unit back by UPS.

The printed repair order must go into the parcel, and the unit must be packed shock-resistant.