Airbag control unit with part number 89170-07570

What does the airbag control unit 89170-07570 do?

The airbag control unit 89170-07570 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, decides within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light. After a crash it stores crash data and locks itself.

The software continuously compares the measured values with stored criteria. In this way the system stays ready in everyday driving without you having to do anything.

Why does the control unit 89170-07570 fail?

The most common cause for the control unit 89170-07570 is stored crash data, even if no airbag has deployed; a standard diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data records what the sensors measured during an impact. It remains in the memory until it is deliberately erased.

The other causes tend to develop gradually. Electronics age, solder joints can go cold, and moisture attacks the contacts.

How can you tell that the 89170-07570 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit 89170-07570, and the fault memory cannot be cleared. In this state, airbags and seatbelt pretensioners may not deploy in an emergency.

The light is a direct sign that the restraint system is not in order. Have the fault memory read out rather than waiting for the display to go out.

Which vehicles is the 89170-07570 fitted in?

The airbag control unit 89170-07570 is fitted in these vehicles: Toyota Avalon XX50 Facelift (from 2022) and XX50 (2018-2022).

The following list shows the vehicles known for this control unit.

• Toyota Avalon XX50 Facelift (from 2022)
• Toyota Avalon XX50 (2018-2022)

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

How does the repair of the 89170-07570 work?

For the control unit 89170-07570, first have the fault memory read out and attach the log, then disconnect the battery; only then remove the control unit. Then create a repair order online and send the well-packed unit in. At Airbag24 it is checked, repaired and tested, usually within 3–4 working days.

The sequence serves your safety. Only once the battery is disconnected do you remove the control unit from the vehicle.

Airbag24 tests the unit on the test bench, replaces defective components, erases stored 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 89170-07570 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge; after the repair Airbag24 returns it to you by UPS. Enclose the printed repair order in the parcel and pack the unit shock-resistant.

Sufficient padding in a sturdy box protects the control unit during transport.