Airbag control unit with part number 89170-0E461

What does the airbag control unit 89170-0E461 do?

In the restraint system (SRS) of Toyota, the airbag control unit 89170-0E461 acts as the central evaluation unit. It checks the crash sensors, determines whether to trigger in a crash and displays faults via the airbag warning light.

In doing so, it continuously checks the system for faults. After a crash, crash data is stored in the memory and the unit locks itself.

Why does the control unit 89170-0E461 fail?

With the 89170-0E461, the main cause is the storage of crash data after a crash, even if no airbag has deployed; a standard diagnostic tool cannot erase it. Aged electronics, moisture at connectors and voltage spikes can also lead to failure.

The fact that no airbag has deployed does not rule out crash data. Other influences are cold solder joints, corrosion at plug connections and voltage spikes, for example from a weak battery or a jump start. Only a test can clearly establish these causes.

How can you tell that the 89170-0E461 is defective?

A fault in the 89170-0E461 can be recognised by the airbag warning light in the instrument cluster, which lights up constantly or only intermittently. Fault messages in the instrument cluster and a fault memory that cannot be cleared are further signs.

The signs also include:

• The diagnostic tool gets no connection to the control unit.
• The warning light does not go out.

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy. A check should therefore be carried out promptly.

Which vehicles is the 89170-0E461 fitted in?

The airbag control unit 89170-0E461 is found in these vehicles: Toyota Highlander XU70 (from 2019).

A list shows the vehicles in detail:

• Toyota Highlander XU70 (from 2019)

If you compare the part number on the label of the removed unit with this page, you know it is the right unit. However, have the fault memory read out beforehand, because only it shows whether the control unit is defective or a plug 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 89170-0E461 work?

First have the fault memory read out and enclose the log with the unit. Then disconnect the battery, remove the control unit 89170-0E461, create a repair order online and send it in. Processing at Airbag24 usually takes 3–4 working days.

On the test bench, the unit is checked, defective components are repaired, crash data is erased and the function is tested. Your own unit is then sent 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 89170-0E461 get to Airbag24?

Send the control unit 89170-0E461 as a parcel or, for an extra charge, have it collected by UPS. Airbag24 also returns it by UPS after the repair.

The printed repair order goes into the parcel with the unit, and the unit is packed shock-proof.