Airbag control unit with part number 89170-BZ880

What does the airbag control unit 89170-BZ880 do?

The airbag control unit 89170-BZ880 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered.

The control unit belongs to the restraint system, which is meant to protect the occupants in an accident. While driving it works in the background and monitors the entire system continuously.

If it detects a fault, it shows it via the airbag warning light in the instrument cluster. After an accident the control unit stores crash data and locks itself; both affect the unit itself and belong to its function in the restraint system.

Why does the control unit 89170-BZ880 fail?

Stored crash data is the most common cause of faults in the airbag control unit 89170-BZ880, even if no airbag was triggered in the accident. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

A normal diagnostic tool cannot delete the crash data. Airbag24 removes it during the repair, before the control unit is checked and tested.

The other causes concern the electronics in general. Components age over time, solder joints can be cold, and moisture or corrosion attack plug connections. Voltage spikes also act on the electronics.

How can you tell that the 89170-BZ880 is defective?

A defect on the airbag control unit 89170-BZ880 shows up on the airbag warning light in the instrument cluster, on fault messages, on a missing connection to the diagnostic tool, or on a fault memory that cannot be cleared.

• Airbag warning light in the instrument cluster stays on permanently
• Airbag warning light comes on intermittently
• Fault message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Have the system checked promptly as soon as the warning light appears.

A warning light that comes on only intermittently also indicates a detected fault. Follow up on the notice rather than ignoring the light.

Which vehicles is the 89170-BZ880 fitted in?

The control unit 89170-BZ880 is fitted in these vehicles: Toyota Avanza F650 Facelift (2015-2023).

The following vehicles belong to this part number:

• Toyota Avanza F650 Facelift (2015-2023)

Compare the part number on the label of the removed unit with this page. That only ensures you have the right control unit in front of you. Still have the fault memory read out beforehand, because only this result shows whether the control unit itself is defective or whether a plug or a 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-BZ880 work?

First you have the fault memory read out and enclose the log, then you disconnect the battery and only then remove the control unit 89170-BZ880. Next, you create a repair order online and send the unit in well packed. Processing at Airbag24 generally takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. The stored crash data is deleted, followed by a function test.

The 3–4 working days refer only to checking, repairing and testing at Airbag24. Afterwards your own unit goes 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-BZ880 get to Airbag24?

You send the control unit 89170-BZ880 as a parcel, or you book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the control unit shock-proof.