Airbag control unit with part number 89170-47650

What does the airbag control unit 89170-47650 do?

The airbag control unit 89170-47650 controls the airbags and seatbelt pretensioners in the Toyota restraint system (SRS). It constantly checks the sensors and firing circuits, calculates the appropriate triggering within milliseconds in the event of a crash and indicates faults via the airbag warning light. After an accident it stores crash data and locks itself.

In the vehicle the unit normally goes unnoticed as long as it reports no fault.

Until it is repaired, the lock remains in place; a repair is therefore the only way to end it.

Why does the control unit 89170-47650 fail?

Crash data stored in the unit after an accident is the most common cause of failure in the control unit 89170-47650, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes are ageing of components, soldered joints, moisture and corrosion, and voltage spikes.

In everyday use the entry therefore remains until it is deleted during a repair.

Moisture and corrosion at plug connections, as well as voltage spikes, also count among the causes.

How can you tell that the 89170-47650 is defective?

An airbag warning light in the instrument cluster that stays on constantly or intermittently is the first sign. Alongside it, the instrument cluster shows an error message, and a diagnostic tool cannot find the control unit 89170-47650.

• Airbag system warning lamp stays on constantly or intermittently
• Message appears in the instrument cluster
• Diagnostic tool fails to establish a connection to the control unit
• Fault memory remains after an attempt to erase it

As long as such signs are present, airbags and seatbelt pretensioners may not trigger in an emergency.

Check any irregularities promptly by having the fault memory read out.

Which vehicles is the 89170-47650 fitted in?

The control unit 89170-47650 is fitted in these vehicles: Toyota Prius IV XW50 (2015-2018) and IV XW50 Facelift (2018-2022).

The list shows the vehicles recorded for this part number.

• Toyota Prius IV XW50 (2015-2018)
• Toyota Prius IV XW50 Facelift (2018-2022)

Comparing the part number on the label with this page ensures that it is the matching unit. Whether the control unit itself is defective, however, only the read-out fault memory will show, because a plug or a cable can also be responsible.

For the same vehicles, we also repair control units with the part numbers 89170-47030, 89170-47611.

How does the repair of the 89170-47650 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit 89170-47650. Next, create the repair order online and send the unit in, well packed.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Your own unit is then returned to you.

Processing at Airbag24 usually takes 3–4 working days. This figure refers only to checking, repair and testing.

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 89170-47650 get to Airbag24?

You can send the control unit 89170-47650 as a parcel, or a UPS collection can be booked for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Put the printed repair order in the parcel. Pack the unit shock-proof so that it survives the journey.