Airbag control unit with part number 89170-BZ450

What does the airbag control unit 89170-BZ450 do?

The airbag control unit 89170-BZ450 coordinates the restraint system for Toyota. In an accident it works out which airbags and seatbelt pretensioners trigger, and it monitors the sensors continuously. Seatbelt pretensioners are activated in the same way as the airbags.

The airbag warning light in the instrument cluster alerts the driver to faults. After an accident, the unit stores crash data and then locks itself.

Why does the control unit 89170-BZ450 fail?

Crash data from an accident, which arises even without a triggered airbag, is the most common cause of a failure in the 89170-BZ450. Further causes are aged electronic components, dry solder joints, moisture and corrosion at plug connections, and voltage spikes.

A standard diagnostic tool cannot remove this data. Airbag24 erases it during the repair and checks the other causes on the test bench.

How can you tell that the 89170-BZ450 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently on the 89170-BZ450, and an error message also appears in the instrument cluster. The diagnostic tool then finds no connection to the control unit, and the fault memory remains.

In an emergency, airbags and seatbelt pretensioners may not trigger. The finding should therefore be clarified promptly.

Which vehicles is the 89170-BZ450 fitted in?

The control unit 89170-BZ450 is fitted in these vehicles: Toyota Avanza F650 Facelift (2015-2023).

These vehicles are listed here:

• Toyota Avanza F650 Facelift (2015-2023)

Comparing the part number on the label of the unit with this page only tells you about the identity of the unit. Whether it is defective itself, or whether a plug or cable causes the fault, is shown by the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 17952812-928112, 17952815-928143, 89170-BZ440.

How does the repair of the 89170-BZ450 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit 89170-BZ450. Create the repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. These steps usually take 3–4 working days there, after which your own unit is returned.

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-BZ450 get to Airbag24?

You send the control unit 89170-BZ450 as a parcel or take up a UPS collection for an extra charge. The return after the repair follows by UPS.

Pack the unit shock-proof and enclose the printed repair order.