Airbag control unit with part number 89170-42A30

What does the airbag control unit 89170-42A30 do?

The airbag control unit 89170-42A30 is the central unit of the restraint system (SRS) in Toyota vehicles. It checks the signals from the crash sensors and, in an accident, directs the triggering of the airbags and seatbelt pretensioners.

The unit monitors the system constantly and indicates faults with the airbag warning light. After an accident, it stores crash data and then locks itself.

Why does the control unit 89170-42A30 fail?

The most common cause of the 89170-42A30 failing is stored crash data after an accident, even if no airbag has triggered. A standard diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and voltage spikes are also causes.

Airbag24 removes the crash data during the repair. The other causes concern the electronics themselves or their connections, such as plugs, where moisture or corrosion can cause contact problems.

How can you tell that the 89170-42A30 is defective?

On the 89170-42A30, a defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and through a fault message. If the diagnostic tool cannot be connected or the fault memory cannot be cleared, a defect is to be considered.

With the system faulty, airbags and seatbelt pretensioners may not trigger in an emergency. The light is therefore a reason for a prompt check.

Which vehicles is the 89170-42A30 fitted in?

Whether your vehicle matches the unit can be seen from your vehicle papers. The control unit 89170-42A30 is used with Toyota and fitted in these vehicles: Toyota RAV4 XA50 (from 2018).

The models are listed here:

• Toyota RAV4 XA50 (from 2018)

Before removal, have the fault memory read out. Only the log shows whether the control unit itself is affected or whether a connector or cable is the cause. Comparing the part number on the label with this page only confirms that you have the correct unit.

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 89170-42A30 work?

First have the fault memory read out and attach the log. Then disconnect the battery, only then remove the control unit 89170-42A30, create the repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. 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 89170-42A30 get to Airbag24?

You send the control unit 89170-42A30 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Place the printed repair order in the carton and pack the control unit shock-proof.