Airbag control unit with part number 89170-F4460

What does the airbag control unit 89170-F4460 do?

The airbag control unit 89170-F4460 coordinates the restraint system (SRS) for Toyota. It evaluates the signals of the crash sensors, determines in an impact which airbags and seatbelt pretensioners trigger, and monitors the system continuously. It shows detected faults via the airbag warning light.

After an accident it stores crash data and locks itself. The monitoring runs in the background, without you noticing anything.

Why does the control unit 89170-F4460 fail?

The most common cause is crash data stored after an accident, without an airbag having triggered. A normal diagnostic tool cannot remove them. Further causes are aged electronics, cold solder joints, moisture on plugs and voltage spikes.

An accident without triggering can still leave entries in the memory. That is why crash data is named most often as the trigger.

The other causes work gradually: components fatigue, solder joints crack, and contacts oxidise over time.

How can you tell that the 89170-F4460 is defective?

The airbag warning light in the instrument cluster burns permanently or lights up intermittently, an error message appears on the display, and the diagnostic tool cannot reach the control unit. Also, the fault memory cannot be cleared. Then airbags and seatbelt pretensioners may possibly not trigger in an emergency.

The light is the most visible sign of a fault, and it is hard to miss when it is lit.

Which vehicles is the 89170-F4460 fitted in?

The control unit 89170-F4460 is fitted in these vehicles: Toyota C-HR NGX10 Facelift (2019-2023).

The list is here:

• Toyota C-HR NGX10 Facelift (2019-2023)

For the removed unit, compare the part number on the label with this page; this way you ensure it is the right unit. The readout of the fault memory is separate from this and shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-F4210, 8917010110.

How does the repair of the 89170-F4460 work?

Have the fault memory read out first and enclose the log with the unit. Then disconnect the battery and only then remove the 89170-F4460. Afterwards create the repair order online and send the unit well packed. Airbag24 checks it, replaces defective components, erases stored crash data and tests the function.

Processing at Airbag24 usually takes 3–4 working days. The order of the steps is mandatory.

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-F4460 get to Airbag24?

Either you send the 89170-F4460 to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.