Airbag control unit with part number TE69-57K30C

What does the airbag control unit TE69-57K30C do?

The airbag control unit TE69-57K30C is the central component of the restraint system (SRS) in Mazda. It processes readings from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system in the background.

If a fault occurs, the unit reports it via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself.

Why does the control unit TE69-57K30C fail?

The most common cause is crash data left over from an earlier accident, even if no airbag was triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair.

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes from a weak battery or jump-starting

Only a test in the lab shows whether any of these causes applies.

How can you tell that the TE69-57K30C is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

Typical signs at a glance:

• Airbag warning light on
• Error message in the instrument cluster
• No connection to the diagnostic tool
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may therefore fail to trigger. Please have the warning checked promptly.

Which vehicles is the TE69-57K30C fitted in?

The TE69-57K30C is fitted in these vehicles: Mazda CX-9 TC (2016-2020) and TC Facelift (2020-2023).

Below is an overview of the vehicles recorded for this part number.

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

Compare the number on the label of the removed unit with this page; that only confirms it is the right unit. Also have the fault memory read out. 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 TD1157K30, TD1157K30C, TD1157K30D, TE6957K30A, TK48-57-K30B, TK4857K30C.

How does the repair of the TE69-57K30C work?

First, have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit, create a repair order online and send the unit off well packed. At Airbag24, testing, repair and the function test usually take 3–4 working days.

The sequence is part of safety and applies without exception.

Airbag24 tests the control unit on the test bench, replaces defective components, erases crash data and carries out 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 TE69-57K30C get to Airbag24?

Whether you pack and send the control unit TE69-57K30C yourself or book a UPS collection for an extra charge is up to you. Airbag24 returns it by UPS after the repair.

Important are the printed repair order in the parcel and sturdy, shock-proof packaging.