Airbag control unit with part number 89170-12K10

What does the airbag control unit 89170-12K10 do?

The airbag control unit 89170-12K10 is the control unit for the restraint system (SRS) in Toyota. From the crash sensors, it calculates within milliseconds which airbags and seatbelt pretensioners to fire, and keeps the entire system under observation.

If the unit detects a fault, the airbag warning light in the instrument cluster comes on.

After an accident, it stores crash data and locks itself. The lock can only be lifted by a repair.

Why does the control unit 89170-12K10 fail?

With the control unit 89170-12K10, the most common cause is a stored crash data entry after an accident, even if no airbag has deployed. A normal diagnostic tool does not delete it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at connectors, and voltage spikes.

Crash data is created because the control unit has registered the accident. The fact that no airbag deployed makes no difference to this. Airbag24 deletes this data during the repair.

Ageing components, cold solder joints and moisture are among the other causes; they act gradually.

Voltage spikes arise, for example, from a weak battery or when a jump start is connected, and put additional strain on the electronics.

How can you tell that the 89170-12K10 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, or the diagnostic tool cannot find the control unit. A fault memory that cannot be erased also indicates a defect in the 89170-12K10. In this case, the airbags and seatbelt pretensioners may not be able to deploy in an emergency.

Anyone who sees one of these indications should have the system read out promptly, because without a readout the cause remains unclear.

Which vehicles is the 89170-12K10 fitted in?

The 89170-12K10 is fitted in the following vehicles: Toyota Corolla E170 (2013-2018).

Here is the list of vehicles to which the unit is assigned:

• Toyota Corolla E170 (2013-2018)

On the one hand, comparing the number on the label of the removed unit with this page only serves to confirm the right unit. On the other hand, only the fault memory, which you have read out before removal, shows whether the control unit itself is defective or whether a plug or cable is affected.

For the same vehicles, we also repair control units with the part numbers 89170-02C70, 89170-12180, 89170-12G10, 89170-12N50.

How does the repair of the 89170-12K10 work?

Processing by Airbag24 usually takes 3–4 working days, meaning the checking, repairing and testing of the 89170-12K10.

At the start, the fault memory is read out and the log is enclosed with the unit. Then you disconnect the battery, remove the control unit, create the repair order online and pack it well.

Airbag24 examines the control unit on the test bench, repairs defective components, deletes the stored crash data and carries out a function test. You then receive your unit 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 89170-12K10 get to Airbag24?

The control unit 89170-12K10 reaches Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

The printed repair order belongs in the parcel, and the unit is packed shock-proof.