Airbag control unit with part number 89170-42830

What does the airbag control unit 89170-42830 do?

The airbag control unit 89170-42830 manages the restraint system (SRS) of Toyota. It checks the messages from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds in an accident. After an accident it stores crash data and locks itself.

During operation it monitors the entire system and reports irregularities via the airbag warning light in the instrument cluster. The fault is stored in the memory.

Why does the control unit 89170-42830 fail?

Stored crash data from an earlier accident is the most common cause for 89170-42830, even if no airbag has triggered. An ordinary diagnostic tool cannot erase it. In addition there are aged electronics, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data therefore belongs on the checklist as soon as the unit comes from an accident vehicle. An airbag does not need to have triggered for this.

How can you tell that the 89170-42830 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit 89170-42830, or the fault memory cannot be cleared. In this state, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

The light indicates that something is wrong in the restraint system, even if the vehicle can still be driven normally. You should not ignore this warning.

Which vehicles is the 89170-42830 fitted in?

The part number is decisive, not only the brand Toyota. The control unit 89170-42830 is fitted in these vehicles: Toyota RAV4 XA50 (from 2018).

This overview lists the vehicles in which this unit is fitted.

• Toyota RAV4 XA50 (from 2018)

Compare the part number on the label of your removed unit with this page. This only shows whether it is the right unit. Have the fault memory read out beforehand, because the result shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 150800-4431, 152100-0262, 152100-4560, 89170-0R070, 89170-0R090, 89170-0R091.

How does the repair of the 89170-42830 work?

First have the fault memory of the control unit 89170-42830 read out and attach the log. Then disconnect the battery, and only then remove the unit. Create the repair order online and send the well-packed unit; at Airbag24, processing usually takes 3–4 working days.

At Airbag24 the unit is first checked, then defective components are repaired and the crash data is erased. A function test follows, and your own unit is returned 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 89170-42830 get to Airbag24?

You either send the control unit 89170-42830 yourself as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns it to you by UPS after the repair.

Enclose the printed repair order with the parcel; the unit must be packed shockproof.