Airbag control unit with part number 89170-47111

What does the airbag control unit 89170-47111 do?

The airbag control unit 89170-47111 is the central SRS control unit for Toyota. It continuously checks the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and reports faults to the airbag warning light.

The control unit monitors the entire system so that it is ready in an emergency. This includes the sensors, the airbags and the seatbelt pretensioners along with their cables.

In the event of an accident, the unit stores crash data and then locks itself.

Why does the control unit 89170-47111 fail?

The most common cause is an entry with crash data from an earlier accident, even if no airbag was triggered. Other causes are aged components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

A standard diagnostic tool cannot delete this crash data. At Airbag24, it is deleted as part of the repair, because that is part of the work on the unit.

The other causes relate to the condition and environment of the electronics:

• Components age and lose reliability over time.
• Solder joints on the circuit board can become cold.
• Moisture and corrosion attack connectors.
• Voltage spikes, for example from a weak battery or from connecting to a jump-start, stress components.

How can you tell that the 89170-47111 is defective?

A defect on the 89170-47111 shows as an airbag warning light in the instrument cluster that stays on permanently or intermittently, along with a fault message there. The diagnostic tool does not connect to the control unit, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may possibly not trigger if such a fault occurs. For this reason, do not ignore the warning, even if you notice nothing in everyday driving.

Have the finding checked promptly rather than waiting for a failure in an emergency.

Which vehicles is the 89170-47111 fitted in?

The assignment is made by the part number 89170-47111. The control unit 89170-47111 is fitted in these vehicles: Toyota Prius III XW30 (2009-2012) and III XW30 Facelift (2012-2016).

The overview covers the vehicles recorded for this part number.

• Toyota Prius III XW30 (2009-2012)
• Toyota Prius III XW30 Facelift (2012-2016)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Have the fault memory read out beforehand, because only this result shows whether the control unit itself is affected or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-47110, 89170-47B60.

How does the repair of the 89170-47111 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Afterwards, create the repair order online and send the unit in well packed. Airbag24 usually needs 3–4 working days for checking, repairing and testing.

Airbag24 checks the unit on the test bench, repairs defective components, deletes the stored crash data and runs a function test. Your own unit is then returned to you.

The 3–4 working days relate only to this work 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 89170-47111 get to Airbag24?

You send the control unit 89170-47111 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the unit shock-resistant.