Airbag control unit with part number 89170-02R10

What does the airbag control unit 89170-02R10 do?

The airbag control unit 89170-02R10 is the central control unit of the restraint system (SRS) of Toyota. It checks the sensor signals, decides in a crash which airbags and seatbelt pretensioners trigger, and monitors the entire system.

Monitoring runs constantly. If the unit detects a fault, it shows it via the airbag warning light in the instrument cluster.

After an accident, the control unit stores crash data and is then locked.

Why does the control unit 89170-02R10 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered; a standard diagnostic tool does not erase it. Ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

That an airbag did not trigger does not mean the unit was unaffected. The crash data remains in memory until it is removed during a repair.

Electronic components age over time. Solder joints can go cold, and moisture or corrosion affect plug connections. Voltage spikes, for example from a weak battery or jump-starting, are also a possible cause.

How can you tell that the 89170-02R10 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

• airbag warning light permanently or intermittently on
• error message in the instrument cluster
• diagnostic tool cannot reach the control unit
• fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may possibly fail to trigger. Take these signs seriously.

Which vehicles is the 89170-02R10 fitted in?

The 89170-02R10 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

The vehicles in detail:

• 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 that it is the right unit. Have the fault memory read out before you remove anything, because only the log shows whether the control unit itself is defective or whether a plug or cable is affected.

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 89170-02R10 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Then create a repair order online and send the well-packed unit.

Airbag24 checks it on the test bench, replaces defective components, deletes the crash data and carries out a function test. Your own unit then 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 89170-02R10 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. The return after the repair is made by UPS.

Enclose the printed repair order with the unit and pack it shock-proof.