Airbag control unit with part number 89170-BZ030

What does the airbag control unit 89170-BZ030 do?

The airbag control unit 89170-BZ030 is the central control unit of the restraint system (SRS) in Toyota. It evaluates the signals from the crash sensors and decides in an accident, within a few milliseconds, which airbags and seatbelt pretensioners are triggered.

During operation the unit monitors the entire system continuously. If it detects a fault, it displays 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-BZ030 fail?

For the control unit 89170-BZ030, the most common cause is stored data from an accident: crash data saved even if no airbag has deployed. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

A normal diagnostic tool cannot delete this crash data, so a reset does not help. The other causes develop over a longer period: components age, solder joints can go cold, and moisture attacks the contacts. Voltage spikes occur, for example, with a weak battery or a jump start.

How can you tell that the 89170-BZ030 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and an error message appears in the instrument cluster. The diagnostic tool cannot reach the control unit 89170-BZ030, and the fault memory cannot be cleared.

A defect is therefore visible as soon as the warning light responds. As long as the fault persists, airbags and seatbelt pretensioners may not trigger in an emergency. Have the system checked promptly for that reason.

Which vehicles is the 89170-BZ030 fitted in?

The control unit 89170-BZ030 is fitted in these vehicles: Toyota Avanza F650 (2011-2015). Whether it suits your car is shown by comparing it with the label on the unit.

The assignment at a glance:

• Toyota Avanza F650 (2011-2015)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out before you remove the control unit, because only that log 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-BZ030 work?

First read out the fault memory and enclose the log. Then disconnect the battery, and only after that remove the control unit 89170-BZ030. Next create the repair order online and send in the well-packed unit.

At Airbag24 the unit is inspected on the test bench, and defective components are repaired. We then delete the stored crash data and carry out a function test. Processing at Airbag24 usually takes 3–4 working days. Afterwards your own unit is 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-BZ030 get to Airbag24?

You send the control unit 89170-BZ030 as a parcel, or book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Enclose the printed repair order and pack the unit shock-proof.