Airbag control unit with part number FE01 57 K30

What does the airbag control unit FE01 57 K30 do?

The airbag control unit FE01 57 K30 coordinates the restraint system in Mazda and determines in a crash which airbags and seatbelt pretensioners deploy. It continuously checks itself and signals faults via the airbag warning light. After a crash, it stores crash data and locks itself.

The self-check runs in the background for as long as the vehicle is powered up. This keeps the systems ready for action in an actual crash.

The unit stores detected faults in the fault memory, where they are available for diagnosis.

Why does the control unit FE01 57 K30 fail?

Causes with the FE01 57 K30: the most common cause is crash data that remains in the unit after a crash, even if no airbag has deployed. With this control unit, it is often not possible to erase the crash data; if you would like it erased, get in touch with Airbag24 briefly before sending the unit in. Other causes are aged components, moisture and voltage spikes.

The crash data stays in the unit. A normal diagnostic tool cannot erase it, so faults are reported even though the electronics themselves may be intact.

Aged components and cold solder joints are also among the causes. Corrosion at plug connectors and moisture play a similar role.

Voltage spikes, for example from a weak battery or a jump start, can stress the control unit. The inspection shows which cause applies.

How can you tell that the FE01 57 K30 is defective?

Signs at the FE01 57 K30: the airbag warning light in the instrument cluster stays on permanently or intermittently. An error message in the instrument cluster may appear alongside it. In an actual crash, the airbags and seatbelt pretensioners might then not deploy.

The warning light is the most important signal, as it shows a fault directly. Do not ignore it, and have the system checked promptly.

Connection problems also point to a fault: if the code reader cannot connect to the control unit, or the memory stays full after clearing, that too indicates a fault.

Which vehicles is the FE01 57 K30 fitted in?

The FE01 57 K30 is fitted in these vehicles: Mazda RX-8 SE3P (2003-2009) and SE3P Facelift (2009-2012). The assignment is shown in the list below.

The following list shows the associated vehicles:

• Mazda RX-8 SE3P (2003-2009)
• Mazda RX-8 SE3P Facelift (2009-2012)

Compare the part number on the label of the removed unit with this page to make sure that it is the correct unit. Whether the control unit is defective, or whether a connector or cable is the cause, is shown only by the fault memory once it has been read out.

For the same vehicles, we also repair control units with the part numbers F15257-K30C, FE01 57 K30 A.

How does the repair of the FE01 57 K30 work?

Procedure for repairing the FE01 57 K30: first have the fault memory read out and include the log. Then disconnect the battery and only then remove the control unit. Next, create the repair order online and pack the unit carefully.

At Airbag24, the unit is checked on the test bench, defective components are replaced and a functional test is carried out. Processing usually takes 3–4 working days; then the unit is returned to you.

The order of the steps is decisive for your safety. If you would like the crash data erased, get in touch with Airbag24 briefly before sending the unit in. 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 FE01 57 K30 get to Airbag24?

Transport of the FE01 57 K30: for shipping, you use a parcel or a UPS collection, which is booked for an extra charge. After the repair, the unit reaches you by UPS.

Place the printed repair order in the parcel and pack the unit shockproof.