Airbag control unit with part number 89170-52F50

What does the airbag control unit 89170-52F50 do?

The airbag control unit 89170-52F50 coordinates the restraint system (SRS) of Toyota. It evaluates the crash sensors and, in an emergency, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

The unit monitors the connections and components of the system continuously. If it reports a fault, the airbag warning light in the instrument cluster lights up.

After an accident the unit stores crash data and locks itself. Only this fact is recorded here.

Why does the control unit 89170-52F50 fail?

The most common cause is crash data stored after an accident, even if no airbag has fired. A standard diagnostic tool cannot erase this data. Further causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The crash data matters because the control unit creates it independently of whether an airbag fires. If you have experienced no airbag deployment after a collision, the problem therefore cannot be ruled out.

Electronic components age, and solder joints can give way under vibration. Moisture in plug connections leads to corrosion that disturbs the contact.

How can you tell that the 89170-52F50 is defective?

Typical signs are an airbag warning light in the instrument cluster that lights up permanently or intermittently, and a fault message in the instrument cluster. A diagnostic tool that cannot connect to the control unit, or a fault memory that cannot be cleared, also indicates a defect.

As long as the control unit does not work properly, airbags and seatbelt pretensioners may not trigger in an emergency. That makes the warning light a signal you should take seriously.

The light is the vehicle's direct warning. A brief look after getting in shows whether the system has passed its self-test.

Which vehicles is the 89170-52F50 fitted in?

According to our current data, this allocation applies to Toyota. The airbag control unit 89170-52F50 is fitted in these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

The list below shows the models stored in our data for this number.

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

Compare the part number on the label of the removed unit with this page. This only ensures that you have the correct unit. Also have the fault memory read, because only that result shows whether the control unit is defective or whether a connector 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 89170-52F50 work?

First have the fault memory read and enclose the log. Then disconnect the battery and remove the control unit. Next create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

The unit is inspected on the test bench at Airbag24, defective components are replaced, crash data is erased, and a function test concludes the work. Your own unit is then sent back.

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 89170-52F50 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, it is returned to you by UPS.

The printed repair order goes into the parcel. Pack the control unit shock-proof.