Airbag control unit with part number 89170-52G42

What does the airbag control unit 89170-52G42 do?

The airbag control unit 89170-52G42 is the control unit of the restraint system (SRS) for Toyota. It checks the signals from the crash sensors and decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered. Faults in the system are reported via the airbag warning light.

Monitoring runs without interruption for as long as the vehicle is switched on. The system must be ready at every moment, and that is exactly what the control unit is responsible for.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 89170-52G42 fail?

Most often, the cause is crash data that was stored after an accident, even if no airbag was triggered. This data cannot be erased with a normal diagnostic tool. Aged components, cold solder joints, moisture and corrosion at plug connections, as well as voltage spikes, are also possible causes.

Crash data remains in the memory after an accident, and the unit locks itself. The other causes affect the electronics themselves and their surroundings.

Electronic components age, and moisture attacks contacts. Voltage spikes occur, for example, with a weak battery or when jump-starting.

How can you tell that the 89170-52G42 is defective?

An airbag warning light that lights up permanently or intermittently is the most important sign. It is accompanied by a fault message in the instrument cluster that does not clear itself.

• Airbag warning light lights up permanently or comes on intermittently
• Fault message in the instrument cluster
• The diagnostic tool does not get a connection to the control unit
• The fault memory cannot be cleared

If any of these findings is present, airbags and seatbelt pretensioners may not trigger in an emergency. That is why a check should not be postponed.

Which vehicles is the 89170-52G42 fitted in?

The control unit 89170-52G42 is fitted in these vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

The list shows the vehicles recorded for this part 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 shows that the unit is the right one. Have the fault memory read before removal as well, because only this result shows whether the control unit itself 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 89170-52G42 work?

First, have the fault memory read out and attach the log, then disconnect the battery. Only then remove the control unit and create a repair order online. Airbag24 usually takes 3–4 working days to process the unit.

After it is sent in, Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards, 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 89170-52G42 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

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