Airbag control unit with part number 89170-02R40

What does the airbag control unit 89170-02R40 do?

The airbag control unit 89170-02R40 coordinates the restraint systems of Toyota: it reads the impact sensors and calculates within milliseconds which airbags and seatbelt pretensioners are triggered.

At the same time it monitors all components and reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

Without this control unit the entire system does not work reliably, even if all other parts are functioning.

Why does the control unit 89170-02R40 fail?

Stored crash data is the most common cause of failure in the control unit 89170-02R40, because it arises after an accident even when no airbag has deployed. A normal diagnostic tool cannot remove it.

In addition, ageing components, dry solder joints, and moisture and corrosion at plug connections can lead to faults. Voltage spikes, for example from a weak battery or a jump start, are also a possible source.

Airbag24 removes the crash data as part of the repair, while the other sources are checked.

How can you tell that the 89170-02R40 is defective?

A defect in the 89170-02R40 can show up through the airbag warning light, which stays on permanently or intermittently. In addition, an error message in the instrument cluster, missing communication with the diagnostic tool, or a fault memory that cannot be cleared may occur.

Such findings mean that airbags and seatbelt pretensioners may not trigger in an emergency.

Only a prompt check helps here.

Which vehicles is the 89170-02R40 fitted in?

The 89170-02R40 is used in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

The list of models is shown here:

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

Before removal, compare the part number with the label on the unit. Also have the fault memory read out, so that it is clear whether the control unit is defective or whether a cable or a plug is causing the fault.

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 89170-02R40 work?

Before removal, you read out the fault memory, disconnect the battery and remove the control unit 89170-02R40. Then you create the repair order online and send the unit in well packed. Airbag24 checks it, replaces defective components, erases crash data and carries out a function test before your own unit is sent back.

The log of the fault memory belongs in the parcel.

At Airbag24, checking, repairing and testing are usually completed within 3–4 working days. 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 89170-02R40 get to Airbag24?

A parcel or a UPS collection booked for an extra charge brings the control unit 89170-02R40 to Airbag24. After the repair, the unit goes back by UPS.

Print out the repair order and put it into the parcel, then pack the control unit shock-proof.