Airbag control unit with part number 89170-BZ830

What does the airbag control unit 89170-BZ830 do?

The airbag control unit 89170-BZ830 coordinates the restraint system (SRS) of Toyota. It evaluates the messages from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, it monitors the entire system. If it detects a fault, it stores it and reports it via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself.

Why does the control unit 89170-BZ830 fail?

On the 89170-BZ830, stored crash data from an earlier accident is the most common cause, even if no airbag was triggered. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible causes.

Crash data cannot be erased with a normal diagnostic tool. It therefore stays in the memory, even if the accident was a long time ago.

Electronic components age, and solder joints can go cold. Moisture and corrosion affect the plug connectors. Voltage spikes, for example from a weak battery or a jump start, put additional strain on the electronics.

How can you tell that the 89170-BZ830 is defective?

A defect in the 89170-BZ830 shows when the airbag warning light stays on permanently or intermittently and an error message appears in the instrument cluster. It also indicates a problem if the diagnostic tool cannot connect or the fault memory cannot be cleared. In a real emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light is the control unit's own warning. It stays on for as long as the detected fault persists, so it must be taken seriously.

Only the readout shows whether the cause lies in the control unit or in the wiring.

Which vehicles is the 89170-BZ830 fitted in?

The 89170-BZ830 is fitted in these vehicles: Toyota Avanza F650 Facelift (2015-2023).

Airbag24 has the following vehicles assigned to this part number:

• Toyota Avanza F650 Facelift (2015-2023)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Have the fault memory read out in addition, because only that result shows whether the control unit is defective or 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-BZ830 work?

Processing at Airbag24 usually takes 3–4 working days. Beforehand, read out the fault memory, enclose the log and disconnect the battery. Only then remove the 89170-BZ830 and create the repair order online.

Airbag24 inspects the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. The test concludes the inspection, 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-BZ830 get to Airbag24?

You send the control unit 89170-BZ830 in as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns your unit by UPS.

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