Airbag control unit with part number 89170-52F30

What does the airbag control unit 89170-52F30 do?

The 89170-52F30 is the airbag control unit of the restraint system (SRS) for Toyota. It evaluates the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners fire, and monitors the system constantly. After an accident it stores crash data and locks itself.

It indicates faults via the airbag warning light in the instrument cluster.

The crash data also belong to the unit, because they record the course of the accident.

Why does the control unit 89170-52F30 fail?

The most common cause is stored crash data from an accident, even if no airbag fired; an ordinary diagnostic tool cannot delete them. Other causes are ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data are the most common reason for a failure, because they are also recorded when an airbag stays silent.

The other factors concern the electronics: components change with age, solder joints can go cold, and moisture corrodes contacts. Voltage spikes, for example from a jump start, also put the circuits under strain.

How can you tell that the 89170-52F30 is defective?

An airbag warning light that lights permanently or intermittently is a clear sign, together with a fault message in the instrument cluster. In addition the diagnostic tool gets no connection to the 89170-52F30, and the fault memory cannot be cleared. In an emergency the airbags and seatbelt pretensioners may then fail to trigger.

The warning light is the most visible warning signal, because it lies in your field of view while you drive.

A diagnostic tool without a connection and a fault memory that cannot be cleared are further indications that justify a check.

Which vehicles is the 89170-52F30 fitted in?

The control unit 89170-52F30 is fitted in these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017). If your model is listed there, the unit suits in principle.

The list of vehicles follows:

• Toyota Yaris XP130 2nd Facelift (2017-2020)
• Toyota Yaris XP130 (2010-2014)
• Toyota Yaris XP130 1st Facelift (2014-2017)

Have the fault memory read out before removal. Only the log shows whether the control unit is defective or whether a plug or cable is behind it. Comparing the part number on the removed unit with this page only shows that it is the right unit.

For the same vehicles, we also repair control units with the part numbers 2310009950, 89170-0D300, 89170-0D320, 89170-0D590, 89170-0D600, 89170-0D620.

How does the repair of the 89170-52F30 work?

First read out the fault memory of the 89170-52F30 and attach the log; then disconnect the battery and only then remove the control unit. Afterwards create a repair order online and send the unit in well packed. At Airbag24, checking, repair and function testing usually take 3–4 working days.

This sequence is mandatory for safety reasons.

At Airbag24 the unit goes onto the test bench. Defective components are repaired or replaced, stored crash data are deleted, and a function test concludes the work. Afterwards your own unit is returned.

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 89170-52F30 get to Airbag24?

You send the control unit 89170-52F30 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends the unit back to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.