Airbag control unit with part number 89170-12L30

What does the airbag control unit 89170-12L30 do?

The airbag control unit 89170-12L30 is the central control unit of the airbag system in Toyota vehicles. It evaluates the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds.

The computer also checks the wiring and the components permanently. If it detects a deviation, it reports it via the airbag warning light.

An accident leaves crash data in the unit, after which the unit is locked.

Why does the control unit 89170-12L30 fail?

On the 89170-12L30, the most common cause is stored crash data, even if no airbag was triggered. A standard diagnostic tool does not remove these entries. Other causes include aged components, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

Crash data from an incident in which no airbag fired is easily overlooked. It nevertheless remains in the memory and can cause a fault.

The other causes concern electronics, solder joints and contacts, as well as voltage fluctuations. Airbag24 erases the crash data during the repair, and the test shows which further factors play a role.

How can you tell that the 89170-12L30 is defective?

The airbag warning light in the instrument cluster is the most important sign: on the 89170-12L30 it either lights up permanently or only flashes intermittently. A fault message may also appear in the instrument cluster, or the diagnostic tool cannot reach the control unit. In an emergency, airbags and seatbelt pretensioners may then not trigger.

The car may behave inconspicuously in everyday use while the light still indicates a fault in the restraint system. Do not ignore this indication.

A fault memory that cannot be cleared is a further indication of an existing fault.

Which vehicles is the 89170-12L30 fitted in?

The control unit 89170-12L30 is fitted in this vehicle: Toyota Corolla E170 (2013-2018).

Below are the vehicles for which this part number is stored with us:

• Toyota Corolla E170 (2013-2018)

You can compare the part number on the label of the removed unit with this page to confirm that it is the correct unit. Have the fault memory read out beforehand, because the log shows whether the control unit is defective or whether a 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 89170-12L30 work?

For 89170-12L30, you begin by reading out the fault memory and enclosing the log. Then disconnect the battery, and only then remove the control unit. Airbag24 needs 3–4 working days in general for checking, repairing and testing.

You create the repair order online, then pack the unit well and send it in. At Airbag24, a test bench checks the unit, defective components are replaced, the crash data is erased and a function test concludes the work. Afterwards your own unit goes back 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 89170-12L30 get to Airbag24?

There are two ways to reach Airbag24: you send the control unit 89170-12L30 as a parcel, or you book a UPS collection for an extra charge. The return is always made by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.