Airbag control unit with part number 89170-BZ360

What does the airbag control unit 89170-BZ360 do?

For Toyota, the airbag control unit 89170-BZ360 is the central control unit of the restraint system (SRS). It evaluates the signals from the impact sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners fire, and monitors the system at all times. It shows detected faults via the airbag warning light.

The control unit works in the background and does not stand out in everyday use.

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

Why does the control unit 89170-BZ360 fail?

The control unit 89170-BZ360 most often fails because of stored crash data, even if no airbag was triggered in the accident, because a normal diagnostic tool cannot erase it. Other causes include ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

The individual causes at a glance:

• Ageing electronic components
• Cold solder joints on the circuit boards
• Moisture and corrosion on plug connections
• Voltage spikes, for example from a weak battery or a jump start

Airbag24 erases the crash data during the repair; which other cause applies is only shown by the inspection.

How can you tell that the 89170-BZ360 is defective?

A fault shows up as the airbag warning light in the instrument cluster staying on permanently or intermittently, as well as fault messages in the instrument cluster. A diagnostic tool that cannot establish a connection to the control unit, and a fault memory that cannot be cleared, also point to a fault. In an emergency, airbags and seatbelt pretensioners may then not deploy.

These signs occur individually or together depending on the case and must in every instance be taken seriously.

Do not rely on a fault disappearing by itself; have it clarified.

Which vehicles is the 89170-BZ360 fitted in?

The 89170-BZ360 is fitted in these vehicles: Toyota Avanza F650 (2011-2015).

The list contains the vehicles for which this part number is recorded.

• Toyota Avanza F650 (2011-2015)

Comparing the part number on the label of the removed unit with this page only shows that it is the correct unit. Have the fault memory read out beforehand, because only that 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-BZ360 work?

You have the fault memory read out and attach the log, then disconnect the battery and then remove the control unit. After that, create the repair order online and pack the unit carefully. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and repairs defective components; if necessary, components are replaced. Stored crash data is erased and a function test follows. Afterwards the 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-BZ360 get to Airbag24?

Either you pack the control unit yourself for dispatch, or you book a UPS collection for an extra charge. Airbag24 arranges the return of the unit by UPS after the repair.

The printed repair order belongs in the parcel, and the unit must be packed shock-resistant.