Airbag control unit with part number 89170-0R020

What does the airbag control unit 89170-0R020 do?

The airbag control unit 89170-0R020 is the central control unit of the restraint system for Toyota. It evaluates the signals from the crash sensors, decides in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

The sensors continuously supply measured values, from which the unit derives its decision. This evaluation takes place without a pause.

After an accident, the unit stores crash data and locks itself. A reported fault therefore calls for a prompt check.

Why does the control unit 89170-0R020 fail?

On the 89170-0R020, the most common cause after an accident is stored crash data, even if no airbag has deployed; a standard diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data remains in the memory after an accident, even if airbags and seatbelt pretensioners were not triggered. A standard diagnostic tool cannot be made to remove it.

Electronics age, and components lose reliability over time. Cold solder joints, moisture and corrosion on plugs, and voltage spikes in the vehicle electrical system can also cause faults. Only the inspection shows which cause is present.

How can you tell that the 89170-0R020 is defective?

On the 89170-0R020, a defect shows through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, through a fault message in the instrument cluster, through no connection to the diagnostic tool, and through a fault memory that cannot be cleared.

Typical signs are:

• warning light permanently or intermittently on
• fault message in the instrument cluster
• no connection to the diagnostic tool
• fault memory cannot be cleared

With these signs, airbags and seatbelt pretensioners may not trigger in an emergency, even if the vehicle behaves completely normally in everyday use.

Which vehicles is the 89170-0R020 fitted in?

The control unit 89170-0R020 is fitted in these vehicles: Toyota RAV4 XA30 (2006-2009) and XA30 Facelift (2009-2013).

The fitment covers the following models:

• Toyota RAV4 XA30 (2006-2009)
• Toyota RAV4 XA30 Facelift (2009-2013)

Compare the part number on the label of the removed unit with this page, as this only confirms that you have the correct unit. Have the fault memory read out beforehand, because only the log shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 150300-8850, 89170-0R022, 89170-0R140, 89170-42201, 89170-42210, 89170-42420.

How does the repair of the 89170-0R020 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the well-packed unit. Airbag24 usually needs 3–4 working days for this.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Afterwards your own unit is returned.

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 89170-0R020 get to Airbag24?

You send the control unit 89170-0R020 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.