Airbag control unit with part number 89170-47280

What does the airbag control unit 89170-47280 do?

The airbag control unit 89170-47280 controls the restraint system (SRS) in Toyota vehicles. It checks the signals from the crash sensors and decides in a crash which airbags and seatbelt pretensioners are triggered.

At the same time, it monitors the entire system during operation and shows faults via the airbag warning light. After a crash it stores crash data and locks itself; the lock is lifted by the repair.

Why does the control unit 89170-47280 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data remains in memory even if no airbag was triggered in the accident. At Airbag24 it is erased as part of the repair.

The other causes concern the electronics themselves or their surroundings. Over time components age, solder joints can go cold, and moisture or corrosion affects plug connections.

How can you tell that the 89170-47280 is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently, as an error message in the instrument cluster, as a lack of connection to the diagnostic tool, and as a fault memory that cannot be cleared.

When the warning light comes on, the control unit reports a fault in the restraint system. A diagnostic tool that cannot establish a connection to the control unit also indicates a problem. With such a finding, airbags and seatbelt pretensioners may not trigger in an emergency, so please have the system checked promptly.

Which vehicles is the 89170-47280 fitted in?

The airbag control unit 89170-47280 is fitted in these vehicles: Toyota Prius III XW30 (2009-2012) and III XW30 Facelift (2012-2016).

The vehicles recorded for this unit at our end are listed in the overview below.

• 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, and you will know it is the right unit. Only reading out the fault memory shows whether the control unit itself is the cause. Have it read out beforehand, because then it will show whether a plug or a cable is the problem.

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 89170-47280 work?

First have the fault memory read out and attach the log to the unit, then disconnect the battery and remove the control unit. Then create a repair order online and send in the unit. Processing at Airbag24 usually takes 3–4 working days.

The sequence is prescribed for safety reasons: first the fault memory log, then disconnecting the battery, and only then the removal.

At Airbag24 the unit is checked on the test bench, defective components are replaced, stored crash data is erased, and a function test is carried out. Afterwards 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 89170-47280 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Put the printed repair order into the parcel, and pack the unit shock-proof so that it survives the journey.