Airbag control unit with part number 89170-0E470

What does the airbag control unit 89170-0E470 do?

The 89170-0E470 is the central control unit of the restraint system for Toyota. It evaluates the signals from the crash sensors, decides in an accident within milliseconds about airbags and seatbelt pretensioners, and monitors the system.

The unit communicates faults through the airbag warning light in the instrument cluster. In this way you learn that something is wrong with the restraint system.

After an accident it stores crash data and locks itself.

Why does the control unit 89170-0E470 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Other possible causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Aged components and cold solder joints affect the electronics directly. The circuit board can therefore be affected without any accident being behind it.

Moisture and corrosion at plug connections are among the causes that develop over time. Voltage spikes, for example from a weak battery or a jump start, put additional strain on the electronics.

How can you tell that the 89170-0E470 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

These signs point to a fault in the restraint system. In an emergency, airbags and seatbelt pretensioners may then fail to trigger, which is why a prompt check is advisable.

Which cause lies behind it is shown only by reading out the fault memory, not by the light alone.

Which vehicles is the 89170-0E470 fitted in?

The control unit 89170-0E470 is fitted in these vehicles: Toyota Highlander XU70 (from 2019).

These are the vehicles for this part number:

• Toyota Highlander XU70 (from 2019)

The comparison of the part number on the label of the removed unit with this page only shows whether it is the right unit. Whether the control unit is defective or a plug or cable is the cause is decided solely by the fault memory that you have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 89170-0E690.

How does the repair of the 89170-0E470 work?

First have the fault memory read out and the log enclosed. Then disconnect the battery and remove the control unit. Online you create the repair order, then send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and runs a function test. Testing and repair usually take 3–4 working days. Afterwards your own unit comes 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 89170-0E470 get to Airbag24?

You send the unit to Airbag24 as a parcel or book a UPS collection for an extra charge. Airbag24 sends the repaired unit back to you by UPS.

Put the printed repair order into the parcel; pack the unit shock-proof.