Airbag control unit with part number TE69-57K30D

What does the airbag control unit TE69-57K30D do?

The airbag control unit TE69-57K30D controls the restraint system (SRS) of Mazda. It evaluates the signals from the crash sensors and determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself.

In operation, the control unit monitors the entire restraint system without interruption. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

Why does the control unit TE69-57K30D fail?

The most common cause: crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Further causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes at the control unit TE69-57K30D.

The fact that crash data is stored does not yet show which component is defective. Only the test on the test bench clears that up.

The further causes are listed here:

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

How can you tell that the TE69-57K30D is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears. The diagnostic tool finds no connection to the control unit TE69-57K30D, and the fault memory cannot be cleared.

The airbag warning light is a direct sign. Even an intermittent lighting up must be taken seriously, because the system has then detected a fault.

In an emergency, airbags and seatbelt pretensioners may therefore not trigger.

Which vehicles is the TE69-57K30D fitted in?

The allocation is based on the data held at Airbag24 for this part number. The airbag control unit TE69-57K30D is fitted in these vehicles: Mazda CX-9 TC (2016-2020) and TC Facelift (2020-2023).

The vehicles for which this part number is held are listed here:

• Mazda CX-9 TC (2016-2020)
• Mazda CX-9 TC Facelift (2020-2023)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the correct unit in front of you. In addition, have the fault memory read out beforehand, because only this result shows whether the control unit itself is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers TD1157K30, TD1157K30C, TD1157K30D, TE6957K30A, TK48-57-K30B, TK4857K30C.

How does the repair of the TE69-57K30D work?

First, have the fault memory read out. Then disconnect the battery and only then remove the control unit TE69-57K30D. Next, create a repair order online, enclose the log and send the unit in well packed.

At Airbag24 the control unit goes through a test on the test bench. Defective components are repaired, crash data is deleted and a function test is carried out. Your own unit is then returned to you.

Processing at Airbag24 usually takes 3–4 working days. This period covers only the testing, repair and checking carried out at our premises.

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 TE69-57K30D get to Airbag24?

You send the control unit TE69-57K30D to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.