Airbag control unit with part number 89170-52M10

What does the airbag control unit 89170-52M10 do?

The airbag control unit 89170-52M10 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals of the crash sensors and decides in an accident, within a few milliseconds, on the deployment of airbags and seatbelt pretensioners. After an accident it stores crash data and locks itself.

The system is monitored continuously so that a fault is noticed immediately. The message appears via the airbag warning light in the instrument cluster.

Without a functioning control unit, deployment in an emergency is no longer assured, which is why this function is so important for safety.

Why does the control unit 89170-52M10 fail?

The most common cause is stored crash data after an accident, even without an airbag having deployed. Other causes are aged components, cold solder joints, moisture and corrosion at plugs, and voltage peaks.

After an accident the control unit records crash data, even if no airbag has deployed. A normal diagnostic tool cannot remove this data, so the message remains.

Components age over the years, solder joints can be cold, and moisture or corrosion worsen the contact in the plug connections. Strong voltage peaks, for example from a weak battery or a jump-start, can also disturb the electronics.

How can you tell that the 89170-52M10 is defective?

A defect shows up at the airbag warning light, in error messages in the instrument cluster and in a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

Pay particular attention to the following signs:

• The airbag warning light stays on permanently.
• It only lights up intermittently.
• An error message appears in the instrument cluster.
• A diagnostic tool cannot establish a connection to the control unit.
• The fault memory cannot be cleared.

The warning light itself reports the fault, so it is worth looking at the fault memory at the first signs.

Which vehicles is the 89170-52M10 fitted in?

The control unit 89170-52M10 is fitted in these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

Here are the vehicles that Airbag24 has assigned to this part number:

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

Comparing the part number on the label of the removed unit with this page only ensures that it is the right unit. Have the fault memory read out before removal, because only the result shows whether the control unit is defective or whether a plug or cable is the cause.

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 89170-52M10 work?

First have the fault memory read out and enclose 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 processing usually takes 3–4 working days.

Airbag24 tests the unit on the test bench and replaces defective components. Airbag24 then deletes the stored crash data and carries out a function test.

After the test, 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 89170-52M10 get to Airbag24?

You can send the control unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 brings the unit back by UPS.

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