Airbag control unit with part number 89170-BZ200

What does the airbag control unit 89170-BZ200 do?

The airbag control unit 89170-BZ200 controls the restraint system (SRS) in the Toyota. It continuously checks the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

If it detects a fault, it shows this via the airbag warning light in the instrument cluster. For you, the light is the sign that something is wrong in the system.

After an accident the control unit stores crash data and locks itself. The term SRS control unit refers to the same component.

Why does the control unit 89170-BZ200 fail?

The most common cause lies in the crash data stored after an accident, even if no airbag has deployed. In addition, aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are possible causes.

Crash data cannot be erased with a standard diagnostic tool. Airbag24 erases it as part of the repair.

Ageing electronics, cold solder joints, moisture and corrosion at the plugs, and voltage spikes, for example from a weak battery or a jump start, can also lead to a failure.

How can you tell that the 89170-BZ200 is defective?

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

The defect is therefore shown directly in the instrument cluster; the light is the central sign.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Please have the system checked promptly.

Which vehicles is the 89170-BZ200 fitted in?

The 89170-BZ200 is fitted in these vehicles: Toyota Avanza F650 (2011-2015).

The overview shows the vehicles in which this control unit is fitted:

• Toyota Avanza F650 (2011-2015)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Also have the fault memory read out. Only this 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 17952812-928112, 17952815-928143, 89170-BZ440.

How does the repair of the 89170-BZ200 work?

Processing at Airbag24, meaning examination, repair and function test, usually takes 3–4 working days. You have the fault memory read out, disconnect the battery and remove the control unit 89170-BZ200; afterwards you create the repair order online.

Before sending, pack the unit well; the examination at the Airbag24 test bench then follows.

There Airbag24 replaces defective components, erases the stored crash data and carries out a function test. Your own unit is then sent back 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-BZ200 get to Airbag24?

You send the control unit 89170-BZ200 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.