Airbag control unit with part number 89170-0R190

What does the airbag control unit 89170-0R190 do?

The airbag control unit 89170-0R190 controls the restraint system (SRS) in Toyota vehicles. It evaluates the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system permanently.

The unit reports faults via the airbag warning light. Monitoring runs in the background for as long as the vehicle is in operation.

After an accident the control unit creates crash data and is locked afterwards. Only a repair lifts this lock.

Why does the control unit 89170-0R190 fail?

The most common cause is crash data stored after an accident, even without a triggered airbag. A normal diagnostic tool cannot remove this data. In addition there are aging of the electronics, cold solder joints, moisture and corrosion, as well as voltage spikes.

• aged electronic components
• cold solder joints on the circuit board
• moisture and corrosion on plug connectors
• voltage spikes, for example from a weak battery or jump-starting

Crash data remains stored in the control unit until Airbag24 removes it during the repair. Which of the other causes applies in an individual case only becomes apparent during the check.

How can you tell that the 89170-0R190 is defective?

The airbag warning light lights up on the 89170-0R190 permanently or intermittently, an error message appears in the instrument cluster, and the diagnostic tool receives no connection to the control unit. In addition, the fault memory cannot be cleared.

The warning light in the instrument cluster is the clearest sign the vehicle gives you. It can burn constantly or come on only now and then, and in both cases there is a fault.

If there is a defect, airbags and seatbelt pretensioners may not deploy in an emergency. A warning light that comes on therefore calls for a prompt check.

Which vehicles is the 89170-0R190 fitted in?

The airbag control unit 89170-0R190 is fitted in these vehicles: Toyota RAV4 XA50 (from 2018).

The following overview shows the vehicles that we have on record for this part number.

• Toyota RAV4 XA50 (from 2018)

Compare the part number on the label of the removed unit with this page. This only establishes that it is the correct unit. Have the fault memory read out beforehand. Only this result shows whether the control unit is defective or whether 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 89170-0R190 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit 89170-0R190. Next, create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the crash data and carries out a function test. Afterwards the unit goes back to you.

Processing at Airbag24 usually takes 3–4 working days. 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 89170-0R190 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.

The printed repair order belongs in the parcel. Pack the unit shockproof.