Airbag control unit with part number 89170-12F11

What does the airbag control unit 89170-12F11 do?

The airbag control unit 89170-12F11 is the central control unit of the restraint system (SRS) for Toyota. It checks the signals from the crash sensors and determines in an accident which airbags and seatbelt pretensioners are triggered.

In the background, it monitors the entire system and reports detected faults via the airbag warning light in the instrument cluster. This gives you a direct indication of the state of the system.

After an accident, the control unit stores crash data and then locks itself. The repair page further on in this page describes how to deal with it.

Why does the control unit 89170-12F11 fail?

The most common cause is crash data from an accident, even when no airbag has deployed. Other causes are generally ageing electronics, moisture and voltage spikes.

The crash data remains stored because a normal diagnostic tool cannot erase it. Airbag24 removes it in the course of the repair.

Further causes include:

• ageing electronic components
• dry solder joints
• moisture and corrosion on plug connectors
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 89170-12F11 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently. In addition, a fault message appears, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then not deploy. Such signs should not be overlooked.

Anyone who notices such indications should have the system checked promptly.

Which vehicles is the 89170-12F11 fitted in?

You can use the vehicle registration document to classify your own car. The 89170-12F11 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The vehicles stored for this unit can be found here:

• Toyota Corolla E170 (2013-2018)

Comparing the part number on the label of the removed unit with this page merely confirms that you have the right unit. Also have the fault memory read out, because only this shows whether the control unit itself or a plug or cable is the cause.

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 89170-12F11 work?

First have the fault memory read out and attach the log, then disconnect the battery, remove the unit, create a repair order online and pack it well for sending.

At Airbag24, the control unit is checked on the test bench. Defective components are repaired, crash data erased and a function test carried out.

Airbag24 needs 3–4 working days for checking, repairing and testing as a rule. After that, your own unit is sent back. 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 89170-12F11 get to Airbag24?

You send the control unit 89170-12F11 as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

The printed repair order goes into the parcel, and the unit is packed shock-resistant.