Airbag control unit with part number 89170-47530

What does the airbag control unit 89170-47530 do?

In the restraint system (SRS) of Toyota, the airbag control unit 89170-47530 controls all deployments. It checks the crash sensors and decides in a crash, within milliseconds, which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

In operation the unit monitors the system continuously and shows every fault via the airbag warning light in the instrument cluster.

This monitoring runs in the background until a message appears.

Why does the control unit 89170-47530 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a standard diagnostic tool cannot erase it. Other causes include ageing components, cold solder joints, moisture and corrosion, and voltage spikes.

• ageing electronic components in the unit
• cold solder joints on the circuit board
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or from jump starting with external power

Only the examination shows which of these applies.

The exact cause cannot be determined reliably without testing.

How can you tell that the 89170-47530 is defective?

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

• warning light that stays on permanently or intermittently
• fault message in the instrument cluster
• no connection between the diagnostic tool and the control unit
• fault memory that cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then not be able to trigger.

Which vehicles is the 89170-47530 fitted in?

The 89170-47530 is fitted in these vehicles: Toyota Prius III XW30 (2009-2012) and III XW30 Facelift (2012-2016).

The vehicles are listed individually here:

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

Match the part number on the label of the removed unit with this page; that only confirms it is the right unit. Have the fault memory read out beforehand, because only the log shows whether the control unit is defective or whether a plug or a cable is behind it.

For the same vehicles, we also repair control units with the part numbers 89170-47100, 89170-47101, 89170-47110, 89170-47111, 89170-47120, 89170-47140.

How does the repair of the 89170-47530 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit 89170-47530. Then create a repair order online and send in the well-packed unit. Airbag24 checks it on the test bench, repairs defective components, erases stored crash data and carries out a function test, for which 3–4 working days are usually planned.

Afterwards you receive your own unit back.

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 89170-47530 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you via UPS.

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