Airbag control unit with part number 89170-52G50

What does the airbag control unit 89170-52G50 do?

In the Toyota vehicle, the control unit 89170-52G50 takes over control of the restraint system (SRS). It queries the crash sensors and decides in an accident, in a fraction of a second, whether the airbags and seatbelt pretensioners are triggered.

The unit checks the system continuously for faults and shows them via the airbag warning light. After an accident it creates crash data and locks itself.

Without a functioning control unit, the restraint system cannot reliably perform its protective function. That is why diagnosing the unit is so central.

Why does the control unit 89170-52G50 fail?

The cause is most often found in crash data stored after an accident, even if no airbag was triggered; this crash data cannot be erased with a normal diagnostic tool. Added to this are aged electronics, cold solder joints, moisture and corrosion on plugs, and voltage spikes.

Voltage spikes occur, for example, with a weak battery or a jump start. They can strain the electronics.

Which of these causes applies in an individual case can only be narrowed down with the read-out fault memory.

How can you tell that the 89170-52G50 is defective?

If the airbag warning light in the instrument cluster stays on permanently or intermittently, that is a first indication. In addition, a fault message may appear, the diagnostic tool may not find the control unit, or the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may fail to trigger in such a defect. The warning light shows the defect, and a prompt check is then advisable.

Even without further symptoms, it is worth having a lit warning light checked.

Which vehicles is the 89170-52G50 fitted in?

This control unit is installed in the following vehicles: Toyota Yaris XP130 2nd Facelift (2017-2020), XP130 (2010-2014) and XP130 1st Facelift (2014-2017).

The listing below sets out the vehicles.

• 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 removed unit with this page to be sure it is the right unit. Have the fault memory read out beforehand, because only that shows whether the control unit itself is defective or a cable or plug 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 89170-52G50 work?

You read out the fault memory first and enclose the log with the unit. Then you disconnect the battery and remove the control unit; afterwards you create the repair order online. Processing at Airbag24 usually takes 3–4 working days.

The sequence is mandatory, because the control unit may only be removed after the battery has been disconnected.

You pack the unit well and send it. Airbag24 checks it on the test bench and repairs defective components. Airbag24 erases stored crash data during the repair, followed by a function test, and your own unit returns 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 89170-52G50 get to Airbag24?

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

Enclose the printed repair order in the parcel and pack the control unit shockproof.