Airbag control unit with part number 89170-02R50

What does the airbag control unit 89170-02R50 do?

The airbag control unit 89170-02R50 is the central control unit of the restraint system (SRS) of Toyota. It evaluates the crash sensors, decides in an accident which airbags and seatbelt pretensioners are triggered, and monitors the entire system. After an accident it stores crash data and locks itself.

The monitoring runs continuously. If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster.

This makes the control unit the component that makes the difference between triggering and not triggering in an emergency.

Why does the control unit 89170-02R50 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot delete it. In addition there are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Stored crash data stands in the way of a normal diagnosis. It remains in place until the repair removes it.

Ageing electronic components and cold solder joints can interrupt connections. Moisture and corrosion at the plug connections disturb the signals, and voltage spikes, for example from a weak battery or a jump start, additionally stress the electronics.

How can you tell that the 89170-02R50 is defective?

A defect shows up as the airbag warning light, which lights up permanently or intermittently, as a fault message in the instrument cluster, as a diagnostic tool without connection to the control unit, and as a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then possibly not deploy in an emergency.

The airbag warning light in the instrument cluster is the clearest sign. It shows the defect from the very first moment the unit detects it.

A diagnostic tool that cannot establish a connection, or a fault memory that cannot be emptied, additionally point to a fault in the control unit.

Which vehicles is the 89170-02R50 fitted in?

The 89170-02R50 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

The list shows the vehicles stored for this part 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 ensures that it is the correct unit. Also have the fault memory read out, because only the result shows whether the control unit is defective or whether a plug or cable 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 89170-02R50 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Create the repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components where necessary. The stored crash data is deleted, and a functional test follows before your own unit is returned.

The order is fixed for safety reasons. 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 89170-02R50 get to Airbag24?

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

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