Airbag control unit with part number 89170-12G41

What does the airbag control unit 89170-12G41 do?

The airbag control unit 89170-12G41 coordinates the restraint system (SRS) at Toyota. It analyses the signals of the impact sensors and, in an emergency, decides within fractions of a second which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

The unit checks the system continuously. If it reports a fault, the airbag warning light in the instrument cluster appears.

For the driver the work of the unit remains invisible; only the result in the instrument cluster is visible.

Why does the control unit 89170-12G41 fail?

The most common cause is crash data stored in the unit after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Further causes are aged electronics, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

The crash data remains in memory until Airbag24 erases it during the repair.

The other causes develop gradually, for example through ageing or moisture in the plug. Voltage spikes occur, for example, with a weak battery or a jump start.

How can you tell that the 89170-12G41 is defective?

A defect on the 89170-12G41 shows itself mainly through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and through an error message there. The diagnostic tool finds no access to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

A light in the instrument cluster is therefore a reason to have the system checked.

Which vehicles is the 89170-12G41 fitted in?

The airbag control unit 89170-12G41 is found at Toyota in these models: Toyota Corolla E170 (2013-2018).

The assignment is shown as a list below.

• Toyota Corolla E170 (2013-2018)

Comparing the part number on the label of the removed unit with this page helps prevent a mix-up. Whether the control unit itself is defective, or a cable or plug causes the fault, is shown only by the fault log read out beforehand.

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 89170-12G41 work?

First you read out the fault memory and enclose the log in the parcel. Then disconnect the battery and only afterwards remove the control unit 89170-12G41. In the last step, create a repair order online and send the unit in, well packed.

Airbag24 checks the unit, replaces defective components and erases the stored crash data. A function test follows, and then your own unit returns to you.

At Airbag24 processing takes 3–4 working days, meaning checking, repairing and testing. 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 89170-12G41 get to Airbag24?

The control unit 89170-12G41 reaches Airbag24 by parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS as well.

The printed repair order belongs in the shipment, and the unit must be packed shock-proof.