Airbag control unit with part number C513-57K30

What does the airbag control unit C513-57K30 do?

As the central control unit of the restraint system (SRS) of Mazda, the airbag control unit C513-57K30 monitors the crash sensors and triggers airbags and seatbelt pretensioners in an accident. The decision is made within milliseconds. The unit reports faults via the airbag warning light.

After an accident the control unit creates crash data and locks itself. It checks the function of the entire system continuously.

Why does the control unit C513-57K30 fail?

The most common cause is stored crash data, even if no airbag was triggered. Other causes are aged electronics, cold solder joints, moisture or corrosion at plug connections, and voltage peaks.

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

Crash data cannot be erased with a normal diagnostic tool. The other causes are not always visible on the connector, which is why the fault memory provides the decisive clue.

How can you tell that the C513-57K30 is defective?

A defect shows up as an airbag warning light that lights up permanently or intermittently, as an error message in the instrument cluster, or as a diagnostic tool that cannot connect to the control unit.

• The airbag warning light in the instrument cluster lights up.
• An error message appears in the instrument cluster.
• The diagnostic tool receives no connection to the control unit.
• The fault memory cannot be cleared.

Such a finding may mean that airbags and seatbelt pretensioners cannot trigger in an emergency. Please have the warning checked promptly.

Which vehicles is the C513-57K30 fitted in?

The control unit C513-57K30 is fitted in these vehicles: Mazda Mazda5 CW (2010-2013) and CW Facelift (2013-2018).

The vehicles are listed individually here:

• Mazda Mazda5 CW (2010-2013)
• Mazda Mazda5 CW Facelift (2013-2018)

Compare the part number on the removed unit with this page. This only shows that you have the right unit. Also have the fault memory read out, because only the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285010636, 6300022037AA, C513-57-K30A.

How does the repair of the C513-57K30 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit C513-57K30. Afterwards create a repair order online and send the unit in well packed.

Airbag24 replaces defective components, erases the crash data, carries out a check on the test bench and performs a function test. For this, Airbag24 typically allows 3–4 working days.

Afterwards 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 C513-57K30 get to Airbag24?

You send the control unit as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair Airbag24 returns the unit to you by UPS.

The printed repair order belongs in the parcel, and the unit should be packed shockproof.