Airbag control unit with part number 89170-F4570

What does the airbag control unit 89170-F4570 do?

The airbag control unit 89170-F4570 coordinates the SRS restraint system of Toyota. It reads the crash sensors, evaluates an impact within milliseconds and decides which airbags and seatbelt pretensioners are triggered.

During operation it checks the system and shows faults via the airbag warning light. After an accident it stores crash data and locks itself.

Why does the control unit 89170-F4570 fail?

Stored crash data after an accident is the most common cause, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Voltage spikes occur, for example, with a weak battery or a jump start. Which cause applies in each case is shown by reading out the fault memory.

How can you tell that the 89170-F4570 is defective?

A defect is indicated by the airbag warning light in the instrument cluster, which stays on permanently or intermittently. In an emergency, airbags and seatbelt pretensioners may fail to deploy.

Other signs also appear:

• error message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• fault memory that cannot be cleared

If you find any of these, have the system checked.

Which vehicles is the 89170-F4570 fitted in?

The airbag control unit 89170-F4570 is fitted in these vehicles: Toyota C-HR NGX10 Facelift (2019-2023).

These vehicles are on record for this unit in our stock:

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

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Have the fault memory read out beforehand; its content shows whether the control unit is defective or whether a connector 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-F4570 work?

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

This order is fixed for safety reasons. Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test.

Processing at Airbag24 usually takes 3–4 working days. Afterwards your own unit is returned.

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-F4570 get to Airbag24?

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

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