Airbag control unit with part number 89170-BZ610

What does the airbag control unit 89170-BZ610 do?

The airbag control unit 89170-BZ610 coordinates the restraint system (SRS) of Toyota. It evaluates the signals of the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered.

Between accidents the unit monitors all components of the system. A detected fault is reported via the airbag warning light.

After an accident, crash data is stored in the unit, and the unit is locked afterwards.

Why does the control unit 89170-BZ610 fail?

Crash data stored in the memory after an accident is the most common cause. This also applies when no airbag has triggered. A standard diagnostic tool cannot erase it; Airbag24 removes it during the repair.

Other causes are aged electronic components. Cold solder joints, as well as moisture and corrosion at plug connections, are further possible causes.

Finally, voltage spikes can load the unit, for example when the battery is weak or a jump start is given.

How can you tell that the 89170-BZ610 is defective?

A defect on the 89170-BZ610 may show up through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. Fault messages in the instrument cluster and a diagnostic tool that cannot make contact also indicate a defect.

At the same time, the fault memory cannot be cleared, which also points to a fault in the control unit. In an emergency, airbags and seatbelt pretensioners may then fail to trigger, so a check is advisable.

Which vehicles is the 89170-BZ610 fitted in?

This information applies to Toyota. The 89170-BZ610 is fitted in these vehicles: Toyota Avanza F650 Facelift (2015-2023).

The vehicles in detail are listed here:

• Toyota Avanza F650 Facelift (2015-2023)

Have the fault memory read out beforehand, so you know whether the unit itself is defective or whether a plug or cable is the cause. Then compare the part number on the label of the unit with this information.

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-BZ610 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create a repair order online and pack the unit well for shipping.

At Airbag24 the unit is checked on the test bench, defective components are replaced, crash data is erased and a function test is carried out. The unit then goes back to you. Processing at Airbag24 usually takes 3–4 working days. This time covers only checking, repairing and testing at Airbag24.

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-BZ610 get to Airbag24?

You send the control unit 89170-BZ610 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the device back to you by UPS.

Print the repair order and enclose it with the parcel. Pack the unit shock-proof.