Airbag control unit with part number 89170-04410

What does the airbag control unit 89170-04410 do?

The airbag control unit 89170-04410 coordinates the restraint system (SRS) of Toyota: it decides which airbags and seatbelt pretensioners trigger in an accident, and does so within milliseconds. To do this it evaluates the signals from the crash sensors and monitors the system without interruption. It shows faults via the airbag warning light.

During operation the unit checks continuously whether sensors and output stages work correctly. This way it is ready for use without delay in an impact.

After an accident it stores crash data and locks itself.

Why does the control unit 89170-04410 fail?

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

Crash data is the most important point, but not the only one. Over the years the electronics lose performance, and solder joints that were initially fine can go cold.

Moisture and corrosion attack the plug connections. A weak battery or a jump start also brings voltage spikes that can damage the unit.

How can you tell that the 89170-04410 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when there is a defect in control unit 89170-04410. Additionally there may be a fault message, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

The warning light is the clearest sign. It shows that the system has stored a fault, and it may be accompanied by a fault message in the instrument cluster.

If the system shows these signs, the airbags and seatbelt pretensioners may not deploy in an emergency. The diagnostic tool will then also find no connection to the control unit.

Which vehicles is the 89170-04410 fitted in?

The control unit 89170-04410 is fitted in these vehicles: Toyota Tacoma N200 (2004-2015). These details refer to the part number itself.

The vehicles in detail:

• Toyota Tacoma N200 (2004-2015)

A comparison is still worthwhile: compare the part number on the label of the removed unit with this page. Have the fault memory read out before removal, because only the 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 89170-04420, 89170-04570, 89170-04600, 89170-04650.

How does the repair of the 89170-04410 work?

First read out the fault memory and enclose the log, then disconnect the battery and only then remove control unit 89170-04410. Then create a repair order online and send the unit off well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 examines the unit on the test bench and repairs defective components. Airbag24 erases stored crash data during the repair, before a function test. Only then does your own unit go 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 89170-04410 get to Airbag24?

You send the control unit 89170-04410 as a parcel to Airbag24, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back by UPS.

The printed repair order goes into the parcel, and a shock-proof carton protects the unit on the way.