Airbag control unit with part number FE87 57 K30

What does the airbag control unit FE87 57 K30 do?

The airbag control unit FE87 57 K30 is the central control unit of the restraint system (SRS) on Mazda. It evaluates the crash sensors, decides in an accident in the blink of an eye on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. It reports faults via the airbag warning light.

Monitoring runs in the background. If a fault occurs, it ends up in the fault memory.

After an accident, the unit stores crash data and locks itself.

Why does the control unit FE87 57 K30 fail?

Stored crash data is the most common cause on the FE87 57 K30, even if no airbag has deployed. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible. With this control unit, deleting the crash data is often not possible; if you would like it deleted, contact Airbag24 briefly before sending the unit in, so that it can check the part number.

The crash data reflects what the control unit recorded during the accident.

Components lose reliability over time, and cold solder joints can cause contact problems. Moisture and corrosion attack the plug connectors. Which cause applies in each case is only clarified by reading out the fault memory together with an examination of the unit.

How can you tell that the FE87 57 K30 is defective?

A defect on the FE87 57 K30 shows up as the airbag warning light in the instrument cluster lighting up, either permanently or intermittently. This comes with a fault message in the instrument cluster and a diagnostic tool that cannot establish a connection to the control unit.

The warning light is one of the indicators you should keep an eye on in the instrument cluster. In addition, the fault memory cannot be cleared.

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy. Such an indicator is therefore a reason to have the system checked.

Which vehicles is the FE87 57 K30 fitted in?

The control unit FE87 57 K30 is fitted in these vehicles: Mazda RX-8 SE3P (2003-2009) and SE3P Facelift (2009-2012). The list helps you check against your car.

Here is the list:

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

First compare the part number on the label of the removed unit with this page, to be sure that it is the right unit. Also have the fault memory read out before removal, because only this result shows whether the control unit is defective or whether a connector or cable is the cause.

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 FE87 57 K30 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in, well packed. Airbag24 checks the FE87 57 K30 on the test bench, replaces defective components and carries out a function test; processing at Airbag24 usually takes 3–4 working days.

The order of these steps is mandatory for safety reasons.

If you would like the crash data deleted, contact 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 FE87 57 K30 get to Airbag24?

You send the control unit FE87 57 K30 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.