Airbag control unit with part number 89170-0E460

What does the airbag control unit 89170-0E460 do?

The airbag control unit 89170-0E460 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

In operation, the unit monitors the entire system continuously. If it detects a fault, it shows it via the airbag warning light in the instrument cluster. You do not need to operate anything for this; the monitoring runs in the background.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 89170-0E460 fail?

The most common cause of a fault on the 89170-0E460 is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot delete it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

If crash data is in the memory, it is worth looking at the fault memory before you identify the unit as the cause.

Which of the other causes applies only becomes clear when the unit is examined.

How can you tell that the 89170-0E460 is defective?

A defect on the 89170-0E460 shows up as an airbag warning light that stays on permanently or intermittently, as an error message in the instrument cluster, as no connection to the diagnostic tool, or as a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• The airbag warning light in the instrument cluster stays on permanently.
• The airbag warning light only comes on intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool receives no connection to the control unit.
• The fault memory cannot be cleared.

A lit warning light is therefore a reason to have the system checked promptly, rather than ignoring the display.

Which vehicles is the 89170-0E460 fitted in?

The airbag control unit 89170-0E460 is fitted in these vehicles: Toyota Highlander XU70 (from 2019).

Our data for this part number lists these vehicles:

• Toyota Highlander XU70 (from 2019)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the right unit. Have the fault memory read out beforehand, because only this log 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 89170-0E690.

How does the repair of the 89170-0E460 work?

In the repair of the 89170-0E460, you first have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Afterwards the unit goes back to you.

The order is mandatory for your safety: the control unit is only removed once the battery has been disconnected.

Processing at Airbag24 usually takes 3–4 working days. This covers only the work at Airbag24, not your preparation and not the shipping.

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 89170-0E460 get to Airbag24?

You send the control unit 89170-0E460 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the unit so that it is shock-resistant.