Airbag control unit with part number 89170-74180

What does the airbag control unit 89170-74180 do?

The airbag control unit 89170-74180 manages the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors and decides in a crash, within milliseconds, which airbags and seatbelt pretensioners are triggered.

The system is monitored continuously, and faults appear on the airbag warning light in the instrument cluster.

After a crash the unit stores crash data and locks itself.

Why does the control unit 89170-74180 fail?

Crash data stored after an accident is the most common cause, even if no airbag has deployed; an ordinary diagnostic tool cannot erase it. Ageing components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes are also possible.

Stored crash data stays in the unit until it is cleared during the repair. Airbag24 takes care of that.

Ageing components and cold solder joints often go unnoticed in daily use for a long time, until they affect operation. Moisture and corrosion on plug connectors also disturb the contact.

Voltage spikes occur, for example, with a weak battery or jump-starting. The fault memory shows which cause applies.

How can you tell that the 89170-74180 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. In addition come error messages in the instrument cluster and a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

The warning light is the sign you notice first. It shows the defect, so take every message seriously and have the system checked promptly.

If a diagnostic tool has no connection to the control unit, that is a further sign that a check is needed.

Which vehicles is the 89170-74180 fitted in?

The information refers to Toyota models. The control unit 89170-74180 is fitted in these vehicles: Toyota iQ KGJ10 (2008-2015).

The individual vehicles:

• Toyota iQ KGJ10 (2008-2015)

Compare the part number on the label of the removed unit with this page; that only ensures you have the correct unit. Also have the fault memory read out beforehand. Only that result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 150300-2193, 89170-74020, 89170-74140.

How does the repair of the 89170-74180 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Finally, create a repair order online and send in the well-packed unit.

Airbag24 examines the unit on the test bench, fixes defective components, clears stored crash data and runs a function test. Afterwards your own unit is 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 89170-74180 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns the repaired unit by UPS.

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