Airbag control unit with part number 89170-12481

What does the airbag control unit 89170-12481 do?

The airbag control unit 89170-12481 coordinates the restraint system (SRS) of Toyota. It reads the signals from the crash sensors and, in the event of an accident, decides within fractions of a second whether airbags and seatbelt pretensioners are triggered. It monitors the entire system and reports faults via the airbag warning light.

After an accident it stores crash data and locks itself.

In everyday use the control unit stays unobtrusive, as long as all connections are intact.

Why does the control unit 89170-12481 fail?

Stored crash data from an accident is the most common trigger of the problem in the 89170-12481, even without a triggered airbag. A normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion on plug connectors, as well as voltage spikes, are also possible causes.

Whether such data is held in the memory only becomes clear when the fault memory is read out, because it cannot be seen from outside.

The other causes concern the electronics themselves. Components age, solder joints can go cold, and moisture affects the plug contacts. Voltage spikes, for example from a weak battery or jump-starting, put additional strain on the unit.

How can you tell that the 89170-12481 is defective?

You will first recognise a defect in the 89170-12481 by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. A fault message, a lack of contact with the diagnostic tool and a fault memory that cannot be cleared may also come with it. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Pay particular attention to the light, because it reports the defect itself, even when the vehicle otherwise runs normally.

If such a warning appears, the system should be checked promptly.

Which vehicles is the 89170-12481 fitted in?

This assignment applies to the part number 89170-12481. For Toyota, the control unit is fitted in the following vehicles: Toyota Corolla E170 (2013-2018).

The vehicles are compiled in this list:

• Toyota Corolla E170 (2013-2018)

Compare the label on the removed unit with the part number on this page. This only confirms that you have the correct unit in front of you. Whether the control unit is defective or a plug or cable is the cause will be clear only from the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 89170-02C60, 89170-02C70, 89170-02C80, 89170-02C90, 89170-12280, 89170-12340.

How does the repair of the 89170-12481 work?

Have the fault memory read out and enclose the log. Then disconnect the battery and only after that remove the control unit 89170-12481. Create a repair order online and send in the unit, well packed.

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

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 89170-12481 get to Airbag24?

Either you send the control unit 89170-12481 as a parcel or you book a UPS collection for an extra charge. After the repair, Airbag24 brings the unit back to you by UPS. Place the printed repair order in the parcel and pack the unit shockproof.

A sturdy outer packaging with sufficient padding prevents the unit from being damaged on the way.