Airbag control unit with part number 89170-F4610

What does the airbag control unit 89170-F4610 do?

In the Toyota, the airbag control unit 89170-F4610 controls the SRS restraint system. It evaluates the crash sensors and, in an impact, decides which airbags and seatbelt pretensioners are triggered.

The electronics monitor the system continuously and report faults via the airbag warning light.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 89170-F4610 fail?

With the control unit 89170-F4610, the most common cause after an accident is stored crash data, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be removed with ordinary diagnostic tools. Airbag24 erases it during the repair.

The other causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

Which cause applies in an individual case is only determined by testing.

How can you tell that the 89170-F4610 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-F4610 either permanently or intermittently. It is accompanied by a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

The light is the central signal that this control unit provides. Even a brief display is a finding that you should take seriously.

In an emergency, airbags and seatbelt pretensioners may not deploy because of such a fault. A check is therefore the right next step.

Which vehicles is the 89170-F4610 fitted in?

The 89170-F4610 is fitted in these vehicles: Toyota C-HR NGX10 Facelift (2019-2023).

The list of vehicles follows below.

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

First: compare the part number on the label of the removed unit with this page. This establishes that it is the correct unit. Second: have the fault memory read out before removal. Only this log shows whether the control unit itself 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-F4610 work?

Airbag24 needs 3–4 working days for testing, repair and function check. First have the fault memory read out and attach the log, then disconnect the battery and remove the control unit 89170-F4610.

Then create a repair order online and send the unit in well packed. Airbag24 tests it on the test bench, replaces defective components, erases the crash data and carries out a function test.

The repaired unit of your own is then returned 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-F4610 get to Airbag24?

You send the control unit 89170-F4610 as a parcel or book UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

You print out the repair order and put it in the parcel. You pack the unit shockproof.