Airbag control unit with part number 89170-BZ210

What does the airbag control unit 89170-BZ210 do?

The 89170-BZ210 is an airbag control unit and forms the control centre of the restraint system (SRS) for Toyota. It reads the crash sensors, decides within milliseconds in a collision on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. It reports faults via the airbag warning light.

The monitoring covers sensors, cables and output stages and runs during the entire journey.

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

Why does the control unit 89170-BZ210 fail?

Stored crash data is the most common cause, even if no airbag has fired. A common diagnostic tool cannot erase this data. Aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery, are also conceivable.

Crash data arises because the unit has registered an event. Airbag24 deletes it during the repair.

The other causes tend to develop gradually, through ageing of the components, moisture at the contacts and electrical strain.

How can you tell that the 89170-BZ210 is defective?

The airbag warning light in the instrument cluster stays on constantly or intermittently. A fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

The light indicates the finding immediately. A warning that appears only at times is just as serious as a permanent one.

With such a finding, airbags and seatbelt pretensioners may possibly fail to deploy in an emergency.

Which vehicles is the 89170-BZ210 fitted in?

The 89170-BZ210 is fitted in these vehicles: Toyota Avanza F650 (2011-2015).

The following list shows the vehicles:

• Toyota Avanza F650 (2011-2015)

On the one hand: compare the part number on the label of the removed unit with this page, which makes sure you have the right unit. On the other hand: have the fault memory read beforehand. Only this result shows whether the control unit or 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-BZ210 work?

Have the fault memory read and attach the log. Then disconnect the battery and only afterwards remove the control unit. Create the repair order online and send the unit in well packed.

Airbag24 checks the unit, replaces defective components, deletes the crash data and carries out a function test. Processing usually takes 3–4 working days.

Afterwards your own unit goes back to you. The order of these steps is mandatory for safety reasons.

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-BZ210 get to Airbag24?

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

Put the printed repair order in the parcel and pack the unit securely against shocks.