Airbag control unit with part number 89170-BZ380

What does the airbag control unit 89170-BZ380 do?

The airbag control unit 89170-BZ380 is the central control unit for the restraint system in Toyota. It receives the signals from the crash sensors, determines in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system at all times. It reports faults via the airbag warning light.

While driving, the control unit works continuously in the background and logs irregularities.

After an accident it stores crash data and locks itself.

Why does the control unit 89170-BZ380 fail?

The main cause with the 89170-BZ380 is crash data stored after an accident, even without a deployed airbag; a standard diagnostic tool cannot remove them. Aged electronic components, cold solder joints, moisture or corrosion on plug connections, and voltage spikes are also possible causes.

The crash data remain in the unit after the accident. During the repair at Airbag24 they are erased.

Aged electronics and cold solder joints are typical weak points that can show over time.

Moisture and corrosion at plug connections act slowly. Voltage spikes from weak batteries or a jump start can cause further damage.

How can you tell that the 89170-BZ380 is defective?

The airbag warning light in the instrument cluster is the first warning sign on the 89170-BZ380, and it lights up permanently or intermittently. A fault message in the instrument cluster, a diagnostic tool without connection, and a fault memory that cannot be cleared confirm the suspicion. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light points specifically to the restraint system, so a prompt check is worthwhile.

A fault memory that cannot be cleared is a clear indication that the control unit itself may be affected.

Which vehicles is the 89170-BZ380 fitted in?

The control unit 89170-BZ380 is fitted in these vehicles: Toyota Avanza F650 (2011-2015).

The list of affected models:

• Toyota Avanza F650 (2011-2015)

Compare the part number on the unit with this page, and you will know that it is the right unit. Whether the control unit is defective or a cable or connector is the cause is decided by the fault memory. Therefore have it read out before removal.

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-BZ380 work?

Before removal, have the fault memory read out, enclose the log and disconnect the battery. Then create the repair order online and send the unit in well packed. At Airbag24, testing, repairing and checking the 89170-BZ380 usually takes 3–4 working days.

This order serves your safety during removal.

On the test bench Airbag24 inspects the unit, repairs defective components, removes the crash data and carries out a function test. Your own unit is then 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-BZ380 get to Airbag24?

You send the 89170-BZ380 as a parcel, or you book a UPS collection for an additional charge. After the repair, Airbag24 sends the unit back by UPS.

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