Airbag control unit with part number DA8A-57K30A

What does the airbag control unit DA8A-57K30A do?

The airbag control unit DA8A-57K30A is the central control unit of the restraint system (SRS) of Mazda. It evaluates the crash sensors and determines in an impact which airbags and seatbelt pretensioners are triggered. It indicates faults via the airbag warning light.

While driving, the unit checks the system continuously and stores faults in the memory. After an accident it secures crash data and locks itself.

The decision is made within milliseconds, so the electronics work without delay.

Why does the control unit DA8A-57K30A fail?

The most common cause is crash data from an accident, even without an airbag being triggered, which an ordinary diagnostic tool cannot remove. Ageing components, cold solder joints, wetness at plug connections and voltage spikes are also possible causes.

Stored crash data does not automatically mean that the control unit is damaged. Airbag24 removes it during the repair.

The other causes tend to develop gradually. Electronic components age, solder joints can be cold, and moisture and corrosion attack contacts.

Voltage spikes arise, for example, from a weak battery or from jump-starting, and they stress the electronics.

How can you tell that the DA8A-57K30A is defective?

The clearest indication is the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Added to this are fault messages in the instrument cluster, a missing connection between the diagnostic tool and the control unit, or a fault memory that cannot be cleared.

In an emergency, the airbags and seatbelt pretensioners may then not be triggered. That is why the warning must be taken seriously.

A warning light is not a chance finding but a deliberate message from the system. A prompt check is therefore advisable.

Which vehicles is the DA8A-57K30A fitted in?

The control unit DA8A-57K30A is fitted in these vehicles: Mazda Mazda2 DE (2007-2010) and DE Facelift (2010-2014).

The overview of the assignment follows here:

• Mazda Mazda2 DE (2007-2010)
• Mazda Mazda2 DE Facelift (2010-2014)

Compare the part number on the label of the removed unit with this page, and you will know that you have the correct unit. Whether it is defective is clarified only by the fault memory read out beforehand, because it also shows whether a plug or a cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 2S6T-14B056-EN, DF73-57K30B, GC1M-57-K30.

How does the repair of the DA8A-57K30A work?

First have the fault memory read out and enclose the log. Then disconnect the battery before the control unit is removed; afterwards create the repair order online. At Airbag24, testing, repair and the function test usually take 3–4 working days.

Pack the unit well and send it in. Airbag24 examines it on the test bench, replaces defective components, deletes the crash data and tests the function. The unit you own, now repaired, then returns 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 DA8A-57K30A get to Airbag24?

The control unit reaches Airbag24 as a parcel, or you book a UPS collection for an extra charge. Airbag24 handles the return by UPS after the repair.

Enclose the printed repair order in the parcel and pad the unit shock-proof.