Airbag control unit with part number 89170-04671

What does the airbag control unit 89170-04671 do?

The 89170-04671 is the airbag control unit that coordinates the restraint system (SRS) in the Toyota. It processes the measured values from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds in an accident.

During operation it checks the components of the system. It shows detected faults via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself. The lock ends only with the repair.

Why does the control unit 89170-04671 fail?

Stored crash data is the most common cause of a failure of the 89170-04671, even if no airbag has deployed. Aged components, moisture, cold solder joints and voltage spikes are also possible causes.

Crash data arises from the accident itself and remains in memory; a standard diagnostic tool does not erase it. Airbag24 removes it during the repair.

The electronics themselves and their connections also play a role. Components age, solder joints can be cold, and moisture and corrosion attack plug connections.

Voltage spikes, as occur with a weak battery or when connecting a jump start, also stress the unit.

How can you tell that the 89170-04671 is defective?

A defect on the 89170-04671 can be recognised by the airbag warning light when it lights up permanently or intermittently. Further signs include an error message in the instrument cluster, a missing connection to the diagnostic tool and a fault memory that cannot be cleared.

With such findings, airbags and seatbelt pretensioners may fail to deploy in an emergency. This calls for a check, even if the car seems inconspicuous in everyday use.

The warning light is the system's visible signal, and it must not be ignored.

Which vehicles is the 89170-04671 fitted in?

The 89170-04671 is fitted in these vehicles: Toyota Tacoma N300 (2015-2019) and N300 Facelift (2019-2023). The information refers exclusively to this part number.

We list the following vehicles for this part number:

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

Comparing the part number on the label with this page only confirms that it is the right unit. Whether the control unit is defective or a plug or cable is the cause is shown by the fault memory that is read out. Have this read-out carried out in advance.

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 89170-04671 work?

Before the 89170-04671 is removed, have the fault memory read out and enclose the log. Only then disconnect the battery and remove the control unit.

Afterwards you create a repair order online and pack the unit carefully for sending.

At Airbag24, the unit is checked on the test bench, defective components are replaced, the crash data is erased and a function test is finally carried out. The unit then goes back to the sender.

Processing usually takes 3–4 working days and covers testing, repairing and checking only. 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 89170-04671 get to Airbag24?

The 89170-04671 is sent either as a parcel or shipped with a UPS collection booked for an extra charge. The return after the repair is handled by UPS.

Place the printed repair order in the parcel and protect the control unit shock-proof.