Airbag control unit with part number 89170-0F030

What does the airbag control unit 89170-0F030 do?

The airbag control unit 89170-0F030 is the central control unit of the restraint system of Toyota. It processes the signals from the crash sensors, decides in a crash within milliseconds on triggering airbags and seatbelt pretensioners, and monitors the system continuously.

If the system reports a fault, it shows it via the airbag warning light in the instrument cluster. Evaluation of the sensor data runs uninterrupted in the background.

After an accident the unit stores crash data and then locks itself. Only a repair lifts this lock.

Why does the control unit 89170-0F030 fail?

The most common cause is crash data from an earlier accident, even if no airbag was triggered; a normal diagnostic tool cannot delete it. Further causes are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

This data stays in the control unit. Airbag24 deletes it as part of the repair.

The other causes concern the electronics themselves: components age, solder joints can remain cold, and moisture or corrosion attacks plug connections. Voltage spikes additionally stress the system, for example when starting with external power.

How can you tell that the 89170-0F030 is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently, as fault messages in the instrument cluster, and as the diagnostic tool being unable to make a connection to the 89170-0F030.

Typical signs at a glance:

• Airbag warning light in the instrument cluster lights up permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

With these signs, airbags and seatbelt pretensioners may possibly not trigger in an emergency. The light is therefore a hint you should follow up promptly.

Which vehicles is the 89170-0F030 fitted in?

The 89170-0F030 is fitted in these vehicles: Toyota Corolla E140 (2006-2013).

The allocation shows the models to which this part number is assigned with us.

• Toyota Corolla E140 (2006-2013)

Compare the part number on the label of the removed unit with this page; this tells you only that it is the correct unit. Whether the control unit is defective or plugs or cables are the cause is shown by the fault memory, which you have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 89170-0F032, 89170-12160.

How does the repair of the 89170-0F030 work?

Processing at Airbag24 usually takes 3–4 working days. Beforehand, read out the fault memory and enclose the log, then disconnect the battery. Only after that remove the unit and create the repair order online.

Then send the unit in well packed. Airbag24 tests it on the test bench, replaces defective components, deletes the crash data and carries out a function test.

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 89170-0F030 get to Airbag24?

You send the control unit 89170-0F030 to us as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns the unit by UPS.

Enclose the printed repair order in the parcel; the unit must be packed shock-resistant.