Airbag control unit with part number 89170-47A50

What does the airbag control unit 89170-47A50 do?

The airbag control unit 89170-47A50 is responsible for the restraint system (SRS) of Toyota. It evaluates the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners trigger.

The unit checks the system constantly. It shows faults via the airbag warning light.

After an accident, it stores crash data and is then locked.

Why does the control unit 89170-47A50 fail?

The most common cause with the 89170-47A50 is crash data stored after an accident, even without an airbag deployment. Ageing electronics, cold solder joints, moisture and corrosion, and voltage spikes also play a role.

Crash data cannot be removed with an ordinary diagnostic tool. It therefore remains stored.

The other triggers act gradually. Components age, solder joints go cold, and moisture and corrosion settle in plugs. Voltage spikes arise, for example, from a weak battery or jump-starting.

How can you tell that the 89170-47A50 is defective?

A defect in the 89170-47A50 becomes visible through the airbag warning light, which stays on permanently or intermittently. An error message in the instrument cluster, a missing contact with the diagnostic tool or a fault memory that cannot be cleared also point to a fault.

The warning light in the instrument cluster is the most obvious sign. It shows the finding directly.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. Have the system checked as soon as the light comes on.

Which vehicles is the 89170-47A50 fitted in?

The 89170-47A50 is fitted in these vehicles: Toyota Prius V XW60 (from 2022). Comparing the part number on the label with this page helps you identify the correct unit.

Here follows the list of assigned vehicles.

• Toyota Prius V XW60 (from 2022)

The label comparison is a check of identity, not of the cause. So have the fault memory read out beforehand. Then it shows whether the control unit is defective or whether a plug or cable is the problem.

For the same vehicles, we also repair control units with the part numbers 89170-47030, 89170-47860.

How does the repair of the 89170-47A50 work?

Have the fault memory read out, enclose the log and disconnect the battery. Then remove the control unit 89170-47A50, create a repair order online and send the unit in. Processing at Airbag24 usually takes 3–4 working days.

The sequence is mandatory for safety reasons. The control unit is only loosened once the battery is disconnected.

At Airbag24, the unit is checked, defective components are replaced, stored crash data is deleted and a function test is carried out at the end. Your own unit then comes back 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 89170-47A50 get to Airbag24?

You send the control unit 89170-47A50 as a parcel or book a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

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