Airbag control unit with part number 89170-02W71

What does the airbag control unit 89170-02W71 do?

For Toyota vehicles, the airbag control unit 89170-02W71 controls the restraint system (SRS). From the signals of the impact sensors it determines within milliseconds which airbags and seatbelt pretensioners to trigger. After an accident it stores crash data and locks itself.

In everyday use it monitors the wiring, sensors and output stages. If it finds a fault, it creates a fault entry and shows it via the airbag warning light.

Why does the control unit 89170-02W71 fail?

The most common cause is crash data from an accident, which stays in the control unit even if no airbag was triggered. A normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion on connectors also play a role, as do voltage spikes.

The control unit stores the crash data itself, and an ordinary diagnostic tool cannot reach it to erase it. Airbag24 removes it during the repair.

Aged components lose performance over time, and cold solder joints can interrupt the contact. Moisture and corrosion on plug connections weaken the connection.

Voltage spikes from the vehicle electrical system, for example with a weak battery or a jump start, are an additional load.

How can you tell that the 89170-02W71 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. An error message also appears, the diagnostic tool cannot establish a connection with the control unit, and the fault memory cannot be cleared. In this case, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

The warning light is a clear warning sign and should not be ignored.

Only reading out the fault memory shows whether the control unit itself is affected. Until then, the exact cause remains open.

Which vehicles is the 89170-02W71 fitted in?

The control unit 89170-02W71 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

Below you can see the vehicles recorded for this part number.

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

Comparing the part number on the label of your removed unit with this page confirms that it is the right unit. This comparison does not answer the cause of the failure.

Also have the fault memory read out before removal. Only this result shows whether the control unit is defective or whether a connector or a 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 89170-02W71 work?

First have the fault memory read out and enclose the log with the unit. Then disconnect the battery, remove the control unit 89170-02W71 and create the repair order online. Airbag24 checks the unit, repairs defective components, erases the crash data and carries out a function test.

Processing at Airbag24 usually takes 3–4 working days. After that, 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 89170-02W71 get to Airbag24?

The control unit 89170-02W71 goes to Airbag24 by parcel, optionally with a UPS collection booked for an extra charge. The return shipment after completion of the repair is made by UPS.

A repair order belongs in the parcel, and the unit needs shock-resistant packaging.