Airbag control unit with part number 89170-12G30

What does the airbag control unit 89170-12G30 do?

The airbag control unit 89170-12G30 controls the restraint system (SRS) in Toyota. It processes the readings from the crash sensors and decides within milliseconds in an impact which airbags and seatbelt pretensioners fire.

It monitors the wiring and the components of the system permanently. If it detects a deviation, it indicates this via the airbag warning light in the instrument cluster.

An accident leaves crash data in the unit, after which it locks itself. Only a repair lifts the lock.

Why does the control unit 89170-12G30 fail?

Crash data from an accident is the most common cause of the 89170-12G30 failing, even if no airbag was triggered. Ageing electronics, cold solder joints, moisture and voltage spikes are also possible causes.

Stored crash data is the starting point, because a standard diagnostic tool cannot erase it. Airbag24 removes it as part of the repair.

Older electronic components may also give way. Cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start, also put strain on the unit.

How can you tell that the 89170-12G30 is defective?

A defect in the 89170-12G30 shows when the airbag warning light in the instrument cluster stays on permanently or intermittently and a fault message appears. In addition, the diagnostic tool cannot establish a connection to the control unit, and a fault memory cannot be cleared.

If you notice these signs, there is a clear reason to have it checked: in an emergency, airbags and seatbelt pretensioners may fail to trigger.

The light reports the fault directly, so the warning on the dashboard is enough to act. A fault that cannot be cleared does not disappear on its own.

Which vehicles is the 89170-12G30 fitted in?

The control unit 89170-12G30 is fitted in these vehicles: Toyota Corolla E170 (2013-2018). The assignment applies only to this part number.

These vehicles are listed for this part number:

• Toyota Corolla E170 (2013-2018)

Comparing the part number on the label of the removed unit with this page confirms the part number and therefore the right unit. Only the read-out fault memory shows whether the control unit is defective or whether a plug or cable is the cause. Have it read out before you start.

For the same vehicles, we also repair control units with the part numbers 89170-02C70, 89170-12180, 89170-12G10, 89170-12N50.

How does the repair of the 89170-12G30 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the 89170-12G30.

Next, create the repair order online and send the unit in, well packed.

Airbag24 checks the unit on the test bench, replaces defective components and erases the crash data. A function test follows, and then the unit goes back to you.

Processing at Airbag24 usually takes 3–4 working days, meaning checking, repairing and testing only. 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 89170-12G30 get to Airbag24?

You send the 89170-12G30 either as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends the unit back to you via UPS.

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