Airbag control unit with part number 89170-0R180

What does the airbag control unit 89170-0R180 do?

The airbag control unit 89170-0R180 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the impact sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system permanently. It reports faults via the airbag warning light.

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

It connects the sensors with the triggering elements and so determines how the entire system works.

Why does the control unit 89170-0R180 fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage peaks.

Airbag24 erases the crash data as part of the repair.

Further causes at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage peaks, for example from a weak battery or a jump start

How can you tell that the 89170-0R180 is defective?

A defect shows up as the airbag warning light staying on permanently or intermittently, as an error message in the instrument cluster, as no connection to the diagnostic tool, or as a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

Typical signs at a glance:

• airbag warning light, on permanently or intermittently
• error message in the instrument cluster
• diagnostic tool receives no connection to the control unit
• fault memory cannot be cleared

The light shows the finding itself. A look after starting the vehicle therefore makes all the difference.

Which vehicles is the 89170-0R180 fitted in?

The airbag control unit 89170-0R180 is fitted in these vehicles: Toyota RAV4 XA50 (from 2018).

The list of vehicles for which this unit is stored follows here:

• Toyota RAV4 XA50 (from 2018)

Compare the part number on the label of the removed unit with this page. This only confirms the right unit. Have the fault memory read out beforehand, because only this 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 150800-4431, 152100-0262, 152100-4560, 89170-42400, 89170-42870, 89170-42A60.

How does the repair of the 89170-0R180 work?

You first have the fault memory read out and attach the log. Then you disconnect the battery and only afterwards remove the unit. Create the repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the unit on the test bench and replaces defective components. The stored crash data are then erased, and a function test completes the work.

Your own unit goes back to you afterwards. 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 89170-0R180 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 control unit shockproof.