Airbag control unit with part number 89170-52670

What does the airbag control unit 89170-52670 do?

The airbag control unit 89170-52670 manages the restraint system (SRS) of Toyota as the central control unit. It evaluates the crash sensors and determines in a crash which airbags and seatbelt pretensioners are triggered, within milliseconds.

During operation, the unit monitors the entire system and reports faults via the airbag warning light. Wiring, sensors and firing circuits are part of this check.

After a crash, the unit stores crash data and locks itself.

Why does the control unit 89170-52670 fail?

Crash data is the most common cause of the failure of the 89170-52670: it was stored after a crash, even if no airbag has deployed. Further causes are aged electronic components, moisture and corrosion on plug connections, and voltage spikes.

A normal diagnostic tool cannot delete this crash data. Airbag24 deletes it during the repair.

The further causes in detail are:

• aged electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or a jump start

Only the examination of the unit shows which of these causes is present.

How can you tell that the 89170-52670 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently when there is a defect in the 89170-52670. In addition, an error message appears, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In this state, airbags and seatbelt pretensioners may not deploy in an emergency. This also applies to vehicles that appear unremarkable in everyday use. The signs alone do not prove the cause; only reading out the fault memory shows what it is.

Which vehicles is the 89170-52670 fitted in?

The assignment by model is listed on this page. The airbag control unit 89170-52670 is fitted by Toyota in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

Here are the models in detail:

• Toyota Yaris XP90 (2005-2009)
• Toyota Yaris XP90 Facelift (2009-2011)

First compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Secondly, have the fault memory read out before removal, because only this result shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 212986-105, 212986-110, 220749-101, 89170-0D160, 89170-0D170, 89170-0D180.

How does the repair of the 89170-52670 work?

First read out the fault memory of the 89170-52670 and attach the log. Then disconnect the battery; you remove the control unit only afterwards. Then create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. You then receive your own unit back.

Processing at Airbag24 usually takes 3–4 working days. 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 89170-52670 get to Airbag24?

You send the control unit 89170-52670 to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Enclose the printed repair order with the parcel and pack the unit shockproof. Fill any voids in the carton so the unit does not move.