Airbag control unit with part number 89170-04740

What does the airbag control unit 89170-04740 do?

In the Toyota vehicle, the airbag control unit 89170-04740 takes over control of the restraint system (SRS). It reads the crash sensor signals and determines in an impact, within milliseconds, the triggering of airbags and seatbelt pretensioners. After an accident, it stores crash data and locks itself.

The unit checks the condition of the system continuously. Reported faults appear via the airbag warning light in the instrument cluster.

Why does the control unit 89170-04740 fail?

Stored crash data after an accident is the most common cause, even if no airbag fired in the collision. Further causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Stored crash data cannot be erased with a normal diagnostic tool. The other triggers relate to ageing, moisture and voltage fluctuations in the on-board electrics, for example from a weak battery or a jump start. Airbag24 removes the crash data during the repair.

How can you tell that the 89170-04740 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently if the 89170-04740 is defective. Also present are a fault message in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

As long as the system is disturbed, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light is therefore not a cosmetic issue but a warning signal that you should take seriously.

Which vehicles is the 89170-04740 fitted in?

The airbag control unit 89170-04740 is fitted in these vehicles: Toyota Tacoma N300 (2015-2019) and N300 Facelift (2019-2023). Comparing your car with the list quickly shows whether the unit fits.

The list of vehicles with this unit:

• Toyota Tacoma N300 (2015-2019)
• Toyota Tacoma N300 Facelift (2019-2023)

You compare the part number on the label of the removed unit with this page. This makes sure you have the right unit. Have the fault memory read out beforehand, because only that 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 89170-04080, 89170-04120, 89170-04150, 89170-04570.

How does the repair of the 89170-04740 work?

First, have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit 89170-04740. Afterwards, create a repair order online and send in the well-packed unit. At Airbag24, testing, repair and function testing usually take 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards, your own unit goes back.

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 89170-04740 get to Airbag24?

The control unit 89170-04740 reaches Airbag24 either as a parcel you send yourself, or with a UPS collection booked for an extra charge. The return after the repair is made by UPS.

Place the printed repair order in the parcel, and pack the unit so that it is shock-resistant.