Airbag control unit with part number DR61-57K30-B

What does the airbag control unit DR61-57K30-B do?

The airbag control unit DR61-57K30-B is the control unit of the restraint system (SRS) of Mazda. In an accident, it evaluates the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered.

At the same time, it monitors the system continuously and reports faults via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself. This state applies to the control unit, not to the other components.

Why does the control unit DR61-57K30-B fail?

The most common cause with the DR61-57K30-B is the storage of crash data after an accident, even if no airbag has deployed. Other causes include ageing electronics, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. This applies regardless of whether any damage is visible on the vehicle.

The remaining causes relate to the age and environment of the electronics. Components age, solder joints can go cold, and moisture affects the connectors. A weak battery or a jump start can also trigger voltage spikes.

How can you tell that the DR61-57K30-B is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. That is why you should not ignore these signs.

The warning light reports the defect itself, so it is the first indication you should watch for.

Which vehicles is the DR61-57K30-B fitted in?

The DR61-57K30-B is fitted in these vehicles: Mazda Mazda2 DE (2007-2010) and DE Facelift (2010-2014).

The list below shows the vehicles recorded for this part number.

• 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, so that you know it is the correct unit. Have the fault memory read out beforehand, because only the log shows whether the control unit or a connector 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 DR61-57K30-B work?

First have the fault memory read out and attach the log. Then disconnect the battery. Only then remove the control unit and create a repair order online. Processing at Airbag24 takes 3–4 working days.

The sequence is mandatory for safety reasons. Afterwards, pack the unit well and send it in.

Airbag24 tests the unit on the test bench, replaces defective components, deletes stored crash data and runs a function test. Your own unit is then 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 DR61-57K30-B get to Airbag24?

You send the DR61-57K30-B as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

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