Airbag control unit with part number 89170-07360

What does the airbag control unit 89170-07360 do?

The 89170-07360 controls the restraint system (SRS) of Toyota. It evaluates the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident, it stores crash data and locks itself.

In the vehicle, the control unit works constantly in the background. If it detects a fault, it shows this via the airbag warning light in the instrument cluster and records it in the fault memory.

Crash data is the record of the event that the unit keeps after an accident. It remains in the control unit's memory even if the vehicle then drives normally again. That is exactly why it is worth looking at the control unit when the warning light shows something.

Why does the control unit 89170-07360 fail?

The most common cause is crash data stored after an accident, even if no airbag fired; a normal diagnostic tool cannot erase it. In addition, aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting, come into consideration.

An impact does not have to be violent for the unit to record crash data. What matters is the event itself, and the record stays behind even when neither an airbag nor a seatbelt pretensioner has fired.

The other causes tend to creep in. Electronic components age over time, solder joints can go cold, and moisture or corrosion at plug connections leads to intermittent contact problems. Voltage spikes also stress the electronics when the battery is weak or the vehicle is started with jump leads.

How can you tell that the 89170-07360 is defective?

A defect shows up at the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and in an error message in the instrument cluster. A diagnostic tool then receives no connection to the control unit, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may not be able to deploy with such a defect. This applies even if the vehicle seems perfectly normal in everyday use, so the warning light should never be ignored. The light is the visible sign that the restraint system is not working reliably.

Taking the message seriously early prevents a single fault from turning into a bigger problem. A check of the fault memory then quickly brings clarity.

Which vehicles is the 89170-07360 fitted in?

The 89170-07360 is fitted in these Toyota vehicles: Toyota Avalon XX40 (2012-2015) and XX40 Facelift (2015-2018). The fitment applies to the control unit with exactly this part number.

The known vehicles are listed here:

• Toyota Avalon XX40 (2012-2015)
• Toyota Avalon XX40 Facelift (2015-2018)

Before you send the unit in, compare the part number on the label of the removed unit with this page. That only confirms that you have the right unit. Then have the fault memory read out, because only this shows whether the control unit itself is defective or whether a plug or cable is the problem.

For the same vehicles, we also repair control units with the part numbers 89170-07350, 89170-07480.

How does the repair of the 89170-07360 work?

First have the fault memory read out and attach the log to the unit; then disconnect the battery and only then remove the control unit. Next, you create a 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, repairs defective components, erases the crash data and carries out a function test. Afterwards your own unit goes back to you.

The order of these steps protects you during removal, because an accidental deployment can cause injury. That is why the battery must be disconnected before removal.

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 89170-07360 get to Airbag24?

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

Place the printed repair order in the parcel and pack the control unit shock-proof before handing it over.