Airbag control unit with part number 89170-52730

What does the airbag control unit 89170-52730 do?

The airbag control unit 89170-52730 coordinates the restraint system (SRS) in Toyota. It receives the signals from the crash sensors, decides in an accident within milliseconds about airbags and seatbelt pretensioners, and monitors the entire system. It reports faults via the airbag warning light.

Monitoring runs continuously. If an accident occurs, the unit stores crash data and then locks itself.

Why does the control unit 89170-52730 fail?

Stored crash data after an accident is among the most common causes, even if no airbag was triggered, and an ordinary diagnostic tool cannot remove it. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes are also possible causes.

The crash data remains in memory until the unit is processed.

As long as aging progresses only slowly, it remains invisible to the driver. Cold solder joints also show up only over time.

Moisture leads to corrosion at plug connectors, while voltage spikes arise, for example, with a weak battery.

How can you tell that the 89170-52730 is defective?

The airbag warning light in the instrument cluster indicates a fault when it lights up permanently or intermittently. In addition, an error message appears, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

Have this notice clarified promptly. While the fault persists, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

Which vehicles is the 89170-52730 fitted in?

At Toyota, this control unit is found in certain models. The control unit 89170-52730 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

Here is the list of affected models:

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

If the part number on the label of your removed unit matches this page, it is the correct unit. Whether the control unit itself is defective or a connector or cable is the cause is shown only by the fault memory, which you should therefore have read out in advance.

For the same vehicles, we also repair control units with the part numbers 212986-105, 212986-110, 220749-101, 89170-0D170, 89170-0D230, 89170-0D440.

How does the repair of the 89170-52730 work?

First have the fault memory read out and attach the log. Then disconnect the battery, only then remove the control unit, create a repair order online and send in the unit well packed. At Airbag24, processing usually takes 3–4 working days.

At Airbag24, the unit is examined, defective components are repaired, crash data is deleted and a function test follows. 3–4 working days are generally planned for this. Afterwards your own unit goes back 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 89170-52730 get to Airbag24?

You send the unit to Airbag24 as a parcel, or you arrange a UPS collection for an extra charge. The return of the repaired unit is handled by UPS.

Put the printed repair order into the parcel and pack the control unit shock-proof.