Airbag control unit with part number 89170-0D210

What does the airbag control unit 89170-0D210 do?

The airbag control unit 89170-0D210 controls the restraint system (SRS) for Toyota as a central unit. It evaluates the crash sensors and, in an accident, determines within milliseconds which airbags and seatbelt pretensioners fire.

Between accidents the control unit keeps checking the system. If it finds a fault, it shows this via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data and locks itself. Only a repair ends the lock.

Why does the control unit 89170-0D210 fail?

The most common cause on the 89170-0D210 is stored crash data, even when no airbag has triggered. Further causes are aged components, cold solder joints, moisture and corrosion on the plugs, and voltage spikes.

A normal diagnostic tool does not erase the crash data. It remains in the memory until a repair removes it.

The other causes concern the electronics themselves. Over time components fatigue, solder joints can become brittle, and moisture attacks the contacts. A weak battery or a jump-start can also cause voltage spikes that stress the electronics.

How can you tell that the 89170-0D210 is defective?

The airbag warning light on the 89170-0D210 lights up permanently or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then possibly not trigger.

Typical signs at a glance:

• airbag warning light on permanently or intermittently
• fault message in the instrument cluster
• no connection to the control unit via the diagnostic tool
• fault memory cannot be cleared

Each of these signs justifies a check, even if the cause remains open at first.

Which vehicles is the 89170-0D210 fitted in?

The 89170-0D210 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

The overview below shows the vehicles recorded for this part number.

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

Match the part number on the label of the removed unit with this page, and you will know that it is the right unit. The comparison says nothing more. So have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a plug or cable is the cause.

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 89170-0D210 work?

First the fault memory is read out, and the log goes with the unit. Then disconnect the battery and remove the 89170-0D210. Next, create the repair order online and send the unit in, well packed. Airbag24 tests it, repairs defective components, erases the crash data and checks the function before the unit goes back.

The order is mandatory for safety reasons, because the restraint system must not fire unintentionally during the work.

Processing at Airbag24 takes 3–4 working days as a rule, and this time covers testing, repairing and checking only.

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 89170-0D210 get to Airbag24?

You send the 89170-0D210 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

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