Airbag control unit with part number 89170-12471

What does the airbag control unit 89170-12471 do?

As the SRS control unit, the airbag control unit 89170-12471 controls the restraint system of Toyota. It reads the crash sensors, determines within fractions of a second in an accident which airbags and seatbelt pretensioners trigger, and keeps the entire system under constant watch.

Detected faults appear on the airbag warning light in the instrument cluster. In this way, the state of the system becomes visible without you having to open the control unit yourself.

After an accident, the unit stores crash data and locks itself. In everyday use, the control unit goes unnoticed, because it works in the background without being seen.

Why does the control unit 89170-12471 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. It cannot be erased with a standard diagnostic tool. Other causes are aged electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump-start.

Crash data is created in the background and cannot be seen from outside. The vehicle can therefore appear completely unremarkable after an incident, even though the control unit has already stored the data.

The other causes develop over time. Components age, solder joints can become brittle, moisture and corrosion attack the contacts, and voltage spikes stress the electronics.

How can you tell that the 89170-12471 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and the instrument cluster shows a fault message. A diagnostic tool finds no connection to the control unit 89170-12471, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light does not stay silent, but shows the fault. It is therefore worth taking the message seriously and acting promptly so that the system can be checked.

Which vehicles is the 89170-12471 fitted in?

This control unit 89170-12471 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The list of vehicles is shown here:

• Toyota Corolla E170 (2013-2018)

Matching the part number on the label of the removed unit with this page only confirms that you have the right unit. Only the fault memory, read out beforehand, 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 89170-02C70, 89170-12180, 89170-12G10, 89170-12N50.

How does the repair of the 89170-12471 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit 89170-12471. Next, create a repair order online and send the unit in well packed. Airbag24 processes it in 3–4 working days.

On the test bench, Airbag24 checks the unit, replaces defective components, deletes the crash data and carries out a function test. Afterwards, your own unit is returned.

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 89170-12471 get to Airbag24?

You send the control unit 89170-12471 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back via UPS.

Put the printed repair order into the parcel and pack the unit shockproof.