Airbag control unit with part number 89170-04700

What does the airbag control unit 89170-04700 do?

The airbag control unit 89170-04700 coordinates the restraint system (SRS) of Toyota. From the signals of the crash sensors it calculates, in an accident, which airbags and seatbelt pretensioners to trigger, and does so within milliseconds. After an accident it stores crash data and locks itself.

During operation the unit checks the system continuously. If it detects a fault, it displays this via the airbag warning light in the instrument cluster.

In this way the state of the system remains visible to the driver without a diagnostic tool having to be connected straight away.

Why does the control unit 89170-04700 fail?

The most common cause with the 89170-04700 is crash data stored after an accident, even if no airbag has deployed. Ageing components, cold solder joints, moisture and corrosion at plug connections and voltage spikes are also to be considered.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair, so that the unit then works again without this entry.

The other causes are general in nature: electronic components age, solder joints can go cold, and moisture affects plug connections over time.

How can you tell that the 89170-04700 is defective?

The airbag warning light in the instrument cluster indicates a fault when it lights up permanently or intermittently. Accompanying this are a fault message, a missing connection to the diagnostic tool and a fault memory that cannot be cleared.

In such a state airbags and seatbelt pretensioners may possibly not trigger in an emergency. Please take such an indication seriously and have the system checked.

Which vehicles is the 89170-04700 fitted in?

The airbag control unit 89170-04700 is fitted in these vehicles: Toyota Tacoma N300 (2015-2019) and N300 Facelift (2019-2023).

The vehicles with this part number are listed here:

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

Comparing the part number on the label of the removed unit with this page only confirms that the correct unit is in front of you. Have the fault memory read out beforehand, because only the result shows whether the control unit is defective or whether a plug or a 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 89170-04700 work?

Have the fault memory read out first, attach the log, then disconnect the battery and remove the 89170-04700. Processing at Airbag24 usually takes 3–4 working days.

Create the repair order online before you send the well-packed unit in. Airbag24 checks it on the test bench, repairs defective components, erases the stored crash data and carries out a functional test.

Afterwards your own unit goes back to you. The deadline applies only to checking, repairing and testing at Airbag24.

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 89170-04700 get to Airbag24?

You send the 89170-04700 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns the unit to you by UPS.

Enclose the printed repair order in the parcel and pack the control unit shockproof.