Airbag control unit with part number 89170-47820

What does the airbag control unit 89170-47820 do?

The airbag control unit 89170-47820 coordinates the restraint system (SRS) for Toyota. It measures accelerations via the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners fire, and checks the system without pause.

If the system reports a fault, the airbag warning light in the instrument cluster comes on.

After an accident the unit stores crash data and locks itself.

Why does the control unit 89170-47820 fail?

The most common cause is crash data from an accident that remains stored even if no airbag has deployed. Additionally, ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes can cause the failure.

An ordinary diagnostic tool cannot clear crash data, so the fault stays in the memory.

The other causes concern ageing, moisture and electrical stress. Solder joints can go cold, and plug connections corrode.

A voltage spike arises, for example, with a weak battery or a jump start. Airbag24 clears the crash data during the repair.

How can you tell that the 89170-47820 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

These signs show a defect that makes itself noticeable:

• Warning light on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool fails to connect
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not be able to deploy. Please have the finding checked promptly.

Which vehicles is the 89170-47820 fitted in?

The 89170-47820 is fitted in these vehicles: Toyota Prius V XW60 (from 2022).

The vehicles belonging to this part number follow here.

• Toyota Prius V XW60 (from 2022)

Compare the part number on the unit's label with this page. This only shows whether you have the correct control unit in front of you. Have the fault memory read out beforehand, because only this log shows whether the control unit itself is the cause or a plug or cable.

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

How does the repair of the 89170-47820 work?

First have the fault memory read out and enclose the log, then disconnect the battery, remove the control unit, create the repair order online and pack the unit well. At Airbag24, checking, repairing and testing usually take 3–4 working days.

The order is binding for safety reasons.

Airbag24 checks the unit on the test bench, replaces defective components, clears crash data and tests the function. Your own unit then goes 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 89170-47820 get to Airbag24?

You can send the control unit 89170-47820 in as a parcel, or have it collected by UPS for an extra charge. The return after the repair is made by UPS.

Enclose the printed repair order and pack the unit shock-resistant.