Airbag control unit with part number 89170-F4190

What does the airbag control unit 89170-F4190 do?

The task of the airbag control unit 89170-F4190 is to control the restraint system (SRS) of Toyota. The crash sensors supply the signals from which it derives, within milliseconds, the triggering of airbags and seatbelt pretensioners.

While driving, the unit checks the system continuously. It shows faults via the airbag warning light in the instrument cluster.

If the vehicle is involved in an accident, the control unit stores crash data and locks itself.

Why does the control unit 89170-F4190 fail?

Stored crash data is the most common cause when the 89170-F4190 fails, even without a triggered airbag. Aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes are also possible causes.

A normal diagnostic tool cannot erase the crash data, so Airbag24 removes it during the repair. The fact that no airbag was triggered does not change this.

The other causes lie in the electronics. Components age, cold solder joints can cause contact problems, and moisture attacks plug connectors. Voltage spikes, for example from a weak battery or jump-starting, add further strain.

How can you tell that the 89170-F4190 is defective?

The airbag warning light in the instrument cluster indicates a defect on the 89170-F4190 as soon as it lights up permanently or intermittently. Added to this are a fault message, a diagnostic tool without a connection to the control unit and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then not trigger. Do not wait long before having it checked.

Which vehicles is the 89170-F4190 fitted in?

The control unit 89170-F4190 is fitted in these models: Toyota C-HR NGX10 Facelift (2019-2023).

The models that belong to this part number are in the list:

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

Compare the part number on the label of the removed unit with this page. This shows you that it is the correct unit. Have the fault memory read out beforehand: only that result 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-F4190 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only in the next step remove the 89170-F4190. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send the well-packed unit in. At Airbag24 it is checked on the test bench, defective components are replaced, crash data is erased and a function test is run. Afterwards the unit 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-F4190 get to Airbag24?

You send the control unit 89170-F4190 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Pack the unit shock-proof and put the printed repair order into the parcel.