Airbag control unit with part number 89170-04380

What does the airbag control unit 89170-04380 do?

In a crash, the electronics control the triggering of airbags and seatbelt pretensioners of Toyota. They evaluate the crash sensors for this, decide within milliseconds and then monitor the entire system. If they detect a fault, the airbag warning light comes on.

The unit works continuously in the background, not only in an accident. Measured values are checked continuously and compared with the target specifications.

If the vehicle has been involved in an accident, the control unit records the crash data and is locked afterwards.

Why does the control unit 89170-04380 fail?

Stored crash data is the most common cause, even if no airbag has triggered, and a normal diagnostic tool does not erase it. Other causes are aged components, cold solder joints, moisture and corrosion, and voltage spikes from a weak battery or jump-starting. Airbag24 erases the crash data during the repair.

The data proves the event, but it does not yet prove damage to the electronics.

The other causes act over time or through the environment. Ageing and moisture attack contacts, while voltage spikes stress the components in the unit.

How can you tell that the 89170-04380 is defective?

A defect becomes visible when the airbag warning light in the instrument cluster lights up intermittently or permanently, when a fault message appears, or when the fault memory cannot be cleared. A diagnostic tool that cannot make contact with the control unit is a further sign.

If the warning stays on without explanation, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light shows the finding, so it must be taken seriously.

Which vehicles is the 89170-04380 fitted in?

The list may differ depending on model year and equipment. The 89170-04380 is fitted in these vehicles: Toyota Tacoma N200 (2004-2015).

The vehicles documented for this part number are listed below.

• Toyota Tacoma N200 (2004-2015)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Having the fault memory read out shows whether the control unit itself is defective or whether a plug or cable causes the fault.

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 89170-04380 work?

The fault memory is read out first and the log is enclosed; the battery is disconnected and only then is the unit removed. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send the well-packed unit in.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. 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 89170-04380 get to Airbag24?

Your unit goes to Airbag24 as a parcel; alternatively, you can arrange a UPS collection for an extra charge. The return after the repair is by UPS.

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