Airbag control unit with part number 89170-47450

What does the airbag control unit 89170-47450 do?

The airbag control unit 89170-47450 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

Faults are reported via the airbag warning light. After a crash, the unit stores crash data and locks itself.

Why does the control unit 89170-47450 fail?

The most common cause is stored crash data after an accident, even if no airbag has triggered. A normal diagnostic tool cannot delete it. Further causes may be considered.

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

Only the fault memory, once read out, shows which cause applies.

How can you tell that the 89170-47450 is defective?

A defect shows on the airbag warning light in the instrument cluster and on error messages there. In addition, no connection to the diagnostic tool is established, or the fault memory cannot be cleared.

The airbag warning light can stay on permanently or intermittently. In an emergency, airbags and seatbelt pretensioners may possibly not trigger if the restraint system is faulty, so a prompt check is advisable.

Which vehicles is the 89170-47450 fitted in?

This page lists the vehicles for which the number is stored with us. The 89170-47450 is fitted in these vehicles: Toyota Prius III XW30 (2009-2012) and III XW30 Facelift (2012-2016).

The individual vehicles are listed in the following overview.

• 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 to make sure it is the right unit. Also have the fault memory read out beforehand, because only the result 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 89170-47100, 89170-47101, 89170-47110, 89170-47111, 89170-47120, 89170-47140.

How does the repair of the 89170-47450 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. At Airbag24, processing usually takes 3–4 working days, after which your own unit is returned 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 89170-47450 get to Airbag24?

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

Put the printed repair order into the parcel and pack the unit shockproof.