Airbag control unit with part number 89170-0DG20

What does the airbag control unit 89170-0DG20 do?

In the restraint system (SRS) of Toyota, the airbag control unit 89170-0DG20 is the point where all signals converge. It checks the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

The crash sensors provide the basis for this decision, and the control unit evaluates them before it acts. If it finds a fault, it records it in the fault memory.

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

Why does the control unit 89170-0DG20 fail?

Crash data stored by the control unit after an accident is the most common reason, even if no airbag was triggered. A diagnostic tool from the workshop cannot erase it. Airbag24 deletes the data during the repair.

Because the data remains in memory, the system keeps reporting the fault. It does not disappear by itself.

In addition, ageing electronic components, cold solder joints, and moisture or corrosion on plug connections play a role. Voltage spikes, for example from a weak battery or jump-starting, can also disturb the control unit.

How can you tell that the 89170-0DG20 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and under certain circumstances a fault message also appears on the display. No connection to the diagnostic tool and a fault memory that cannot be cleared are further signs of a defect.

With these signs, the airbags and seatbelt pretensioners may not deploy in an emergency. For that reason, have the system examined promptly, even if the vehicle otherwise drives normally.

Which vehicles is the 89170-0DG20 fitted in?

The part number 89170-0DG20 belongs to Toyota. The 89170-0DG20 is used in these vehicles: Toyota Yaris XP210 (from 2020).

The vehicles known to us for this control unit are shown in the list.

• Toyota Yaris XP210 (from 2020)

Read out the fault memory before removal. Only then can it be said with certainty whether the control unit is faulty or a plug or cable is causing the fault. Finally, compare the part number on the label.

For the same vehicles, we also repair control units with the part numbers 89170-0D730, 89170-0DE60, 89170-0DF50, 89170-52350, 89170-K0060.

How does the repair of the 89170-0DG20 work?

Before removal, read out the fault memory and attach the log. Then disconnect the battery, remove the control unit, create a repair order online and pack the unit carefully.

Airbag24 checks the unit on the test bench, replaces defective components, removes the stored crash data and carries out a function test. Airbag24 generally needs 3–4 working days 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 89170-0DG20 get to Airbag24?

Shipment is made as a parcel, or alternatively you book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back by UPS.

Put the printed repair order into the parcel. Pack the unit shockproof.