Airbag control unit with part number 89170-0R450

What does the airbag control unit 89170-0R450 do?

The airbag control unit 89170-0R450 controls the restraint system (SRS) in vehicles of Toyota. From the signals of the crash sensors it calculates whether airbags and seatbelt pretensioners must deploy, and it does so within milliseconds.

The unit monitors the system continuously. Faults appear via the airbag warning light, and after a crash it stores crash data and locks itself; the lock is released only by the repair.

Why does the control unit 89170-0R450 fail?

The most common cause is crash data stored after a crash, even without any airbag having deployed. A standard diagnostic tool cannot remove it. Other causes are aged components, cold solder joints, moisture and corrosion, as well as voltage spikes.

The crash data stays in the memory until Airbag24 removes it during the repair. The fact that no airbag deployed changes nothing about this.

Electronic components age, solder joints can cause contact problems, and moisture attacks plug connections. Voltage spikes, for example from a weak battery or a jump-start, additionally stress the electronics.

How can you tell that the 89170-0R450 is defective?

A defect in the 89170-0R450 is indicated by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Added to this are fault messages, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

The warning light makes the defect visible as soon as the system detects it. If you overlook the warning light, there is a risk that airbags and seatbelt pretensioners may not deploy in an emergency.

A prompt check brings clarity here.

Which vehicles is the 89170-0R450 fitted in?

The control unit 89170-0R450 is fitted in vehicles of Toyota: Toyota RAV4 XA50 (from 2018). Whether your vehicle is among them, check against the list on this page.

These vehicles are recorded 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 confirms the right unit. Have the fault memory read out beforehand, because 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 89170-0R450 work?

First have the fault memory read out and attach the log. Then disconnect the battery, and only then remove the control unit. Online you create the repair order, and the unit is then sent in securely packed. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is examined on the test bench, defective components are replaced, the crash data is erased and a functional test is run. Afterwards 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 89170-0R450 get to Airbag24?

You send the control unit 89170-0R450 to us as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends the repaired unit back to you by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.