Airbag control unit with part number D651-57K30-A

What does the airbag control unit D651-57K30-A do?

The airbag control unit D651-57K30-A carries out the control of the SRS for Mazda. From the signals of the crash sensors it calculates which airbags and seatbelt pretensioners are triggered in an accident, within milliseconds.

It checks the system constantly and makes faults visible via the warning light. Once an accident has occurred, it stores crash data and locks itself.

Why does the control unit D651-57K30-A fail?

Stored crash data is the most common cause: it arises after an accident, even if no airbag has deployed, and a normal diagnostic tool does not erase it. Other causes are aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A weak battery or a jump start can cause voltage spikes that may damage the unit.

How can you tell that the D651-57K30-A is defective?

A defect shows up in the airbag warning light, which lights up permanently or intermittently in the instrument cluster. In addition, a fault message, a missing connection to the diagnostic tool or a fault memory that cannot be cleared may appear.

If the control unit is defective, the airbags and seatbelt pretensioners may not deploy in a crash. The warning light makes the defect visible, and that is exactly its purpose. Have the system checked then.

Which vehicles is the D651-57K30-A fitted in?

The airbag control unit D651-57K30-A is fitted in these vehicles: Mazda Mazda2 DE (2007-2010) and DE Facelift (2010-2014).

The vehicles assigned to this part number follow in the list:

• 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. This only confirms that it is the right unit. Have the fault memory read out beforehand: only this 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 2S6T-14B056-EN, DF73-57K30B, GC1M-57-K30.

How does the repair of the D651-57K30-A work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create a repair order online and send the unit off well packed. Airbag24 then takes over testing, repair and the function test.

The order is binding for safety. Only once the fault memory has been read out and the battery disconnected may the control unit be removed.

At Airbag24 the unit is examined on the test bench, defective components are replaced, stored crash data is erased and a function test is carried out. Processing usually takes 3–4 working days. Afterwards your own unit goes back 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 D651-57K30-A get to Airbag24?

You handle the shipment either as a package or with a UPS collection booked for an extra charge. After the repair Airbag24 sends the unit back by UPS.

The unit and the repair order belong together in the package; pack the control unit shock-proof.