Airbag control unit with part number 89170-07400

What does the airbag control unit 89170-07400 do?

The airbag control unit 89170-07400 coordinates the airbags and seatbelt pretensioners in the Toyota vehicle. It processes the measured values from the crash sensors and decides in a crash which restraint devices respond. In addition, it checks the system continuously and displays faults.

After an accident, the unit stores crash data and locks itself.

In operation, the monitoring runs unobtrusively in the background until a fault occurs.

Why does the control unit 89170-07400 fail?

Stored crash data are the most common cause of the 89170-07400. This also applies if no airbag was triggered; a standard diagnostic tool cannot erase them. Aged components, cold solder joints, moisture at the plugs and voltage spikes also play a role.

Anyone who checks the unit with a diagnostic tool finds the crash data in the memory even if everything looks inconspicuous from the outside.

The other causes mainly affect the electronics: components age, solder joints can go cold, and moisture affects the contacts.

How can you tell that the 89170-07400 is defective?

The airbag warning light in the instrument cluster stays on permanently or comes on only intermittently, and the diagnostic tool cannot connect to the control unit 89170-07400. In addition, the fault memory cannot be cleared. Then airbags and seatbelt pretensioners may not trigger in an emergency.

A fault message in the instrument cluster may accompany the light.

Have a light that does not go out checked promptly. The warning concerns the system itself, not a minor matter.

Which vehicles is the 89170-07400 fitted in?

The allocation applies to part number 89170-07400. This control unit is fitted in these vehicles: Toyota Avalon XX50 Facelift (from 2022) and XX50 (2018-2022).

The vehicles are listed individually here:

• Toyota Avalon XX50 Facelift (from 2022)
• Toyota Avalon XX50 (2018-2022)

A comparison of the part number on the label with this page shows that the removed unit is the correct one. Only the fault memory shows whether the control unit is defective or a connector or cable is behind it. Therefore have it read out before removal.

How does the repair of the 89170-07400 work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit 89170-07400; afterwards create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components and carries out a function test. Stored crash data are also erased by Airbag24. 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 89170-07400 get to Airbag24?

You send the control unit 89170-07400 as a parcel, or you book a UPS collection for an extra charge. Returns after repair are made by UPS. Put the printed repair order in the parcel and pack the unit shock-resistant.

Make sure to use stable packaging with padding, so that the control unit survives transport undamaged.