Airbag control unit with part number 89170-02X90

What does the airbag control unit 89170-02X90 do?

The airbag control unit 89170-02X90 coordinates the restraint system (SRS) of Toyota. It reads the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners fire. Faults in the system are shown to the driver via the airbag warning light.

The control unit monitors all components of the system continuously, including the wiring of the sensors. If it finds a deviation, it records it in the fault memory.

After an accident, it creates crash data and locks itself.

Why does the control unit 89170-02X90 fail?

Most often the cause is crash data stored after an accident, even if no airbag was triggered. A conventional diagnostic tool cannot remove this data. Other causes are aged electronic components, cold solder joints, moisture or corrosion on connectors, and voltage spikes.

At Airbag24, the crash data is removed as part of the repair, because it is deleted there. That is part of the work and not a separate order.

Electronics age, and solder joints can become cold over time. Moisture and corrosion attack connectors, while voltage spikes, for example from a weak battery or jump-starting, stress components.

How can you tell that the 89170-02X90 is defective?

A defect shows as the airbag warning light, which stays on permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool cannot connect to the control unit 89170-02X90, and the fault memory cannot be cleared.

• The airbag warning light stays on permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool does not connect to the control unit.
• The fault memory cannot be cleared.

In such a fault, airbags and seatbelt pretensioners may possibly not trigger in an emergency. For this reason, do not ignore any of these warnings.

Which vehicles is the 89170-02X90 fitted in?

The control unit 89170-02X90 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022). The assignment depends on the part number that you find on the unit.

The following list shows the vehicles recorded for this number.

• Toyota Corolla E210 (2018-2022)
• Toyota Corolla E210 Facelift (from 2022)

Compare the part number on the label of the removed unit with this page. This only shows whether it is the correct unit. Have the fault memory read out beforehand. Only then does it become clear whether the control unit itself is affected or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-02N50, 89170-02T10, 89170-02W80, 89170-0F150.

How does the repair of the 89170-02X90 work?

Processing at Airbag24 usually takes 3–4 working days. Beforehand, have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Next, create the repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and runs a function test. Afterwards, your own unit is returned to you.

These 3–4 working days relate exclusively to the work at Airbag24.

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 89170-02X90 get to Airbag24?

You send the control unit 89170-02X90 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Place the printed repair order in the parcel and pack the unit shock-resistant.