Airbag control unit with part number 89170-BZA60

What does the airbag control unit 89170-BZA60 do?

The airbag control unit 89170-BZA60 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.

In addition, it monitors the entire system without interruption. If it detects a fault, it passes this on via the airbag warning light in the instrument cluster.

After an accident, the unit records crash data and locks itself. The lock only ends with the repair.

Why does the control unit 89170-BZA60 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot remove it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 removes the crash data during the repair. Until then, it remains in the memory of the unit.

The other causes tend to build up gradually. Electronics age, solder joints can become brittle, and moisture attacks contacts. Sudden voltage spikes arise, for example, from a weak battery or from a jump start.

How can you tell that the 89170-BZA60 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition, there is a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

The light is the most important sign, because it reports the fault directly on the dashboard. While it is lit, airbags and seatbelt pretensioners may not be able to deploy in an emergency. You should therefore act promptly.

A single symptom does not yet name the cause. Which cause applies only becomes clear when the fault memory is read out.

Which vehicles is the 89170-BZA60 fitted in?

The 89170-BZA60 is fitted in these vehicles: Toyota Avanza F650 Facelift (2015-2023).

These vehicles are recorded for this part number:

• Toyota Avanza F650 Facelift (2015-2023)

A comparison of the part number on the label of the removed unit with this page ensures that you have the right unit. The comparison does no more than that.

Have the fault memory read out before removal. 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-BZA60 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the unit. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send in the unit, well packed. Airbag24 checks it on the test bench, replaces defective components, erases the crash data and carries out a functional test.

The stated period refers only to checking, repairing and testing at Airbag24, not to your steps or shipping.

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-BZA60 get to Airbag24?

You send the device as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the control unit shock-proof.