Airbag control unit with part number 89170-0R091

What does the airbag control unit 89170-0R091 do?

The airbag control unit 89170-0R091 coordinates the occupant protection systems in vehicles from Toyota. In a collision it evaluates the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered.

In normal operation it checks the system continuously. If it finds a fault, it reports it via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data, after which it is locked.

Why does the control unit 89170-0R091 fail?

The most common cause of control unit 89170-0R091 failing is crash data stored from an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it, and Airbag24 removes it during the repair. Other causes are aged components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

The data makes itself felt during operation and complicates diagnosis, without any component necessarily being defective.

The other causes tend to stem from ageing, moisture and electrical stress. Connections lose reliability over time, and a weak battery or a jump start can cause voltage spikes.

How can you tell that the 89170-0R091 is defective?

A defect in 89170-0R091 is recognised by an airbag warning light that stays on permanently or intermittently, by a fault message in the instrument cluster, by no connection to the diagnostic tool, or by a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then not deploy in an emergency.

As soon as one of these signs appears, a check is advisable. The light does not yet reveal the cause, but it is a clear signal that something in the system is not right.

Have the fault memory read out before taking any further steps, so that the finding is documented in writing.

Which vehicles is the 89170-0R091 fitted in?

Control unit 89170-0R091 is fitted in this vehicle version: Toyota RAV4 XA50 (from 2018). This assignment comes from the data for this part number.

Here is the list of vehicles we assign to this part number.

• Toyota RAV4 XA50 (from 2018)

Compare the part number on the label of the removed unit with this page. This only shows whether the unit fits, nothing more. The fault memory, on the other hand, shows whether the control unit is defective or whether a connector or cable is the cause, so have it read out in advance.

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 89170-0R091 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only now remove control unit 89170-0R091. Create a repair order online, with which you send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is checked on the test bench. Defective components are replaced on the unit, stored crash data is removed and a function test is carried out. Afterwards your own unit goes back 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 89170-0R091 get to Airbag24?

You send control unit 89170-0R091 as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Put the printed repair order into the parcel and add shock-proof packaging for the unit.