Airbag control unit with part number 89170-12D80

What does the airbag control unit 89170-12D80 do?

The airbag control unit 89170-12D80 controls the restraint system (SRS) for Toyota. It reads the impact sensors, decides within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It indicates faults via the airbag warning light.

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

Triggering depends entirely on this evaluation. That is why the control unit plays a central role for the entire protection system.

Why does the control unit 89170-12D80 fail?

Stored crash data after an accident is the most common cause, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage peaks are further causes.

Airbag24 removes this data during the repair. Erasing it with on-board means does not work.

The other causes are linked to ageing and external influences. They can develop over time without being noticed beforehand.

How can you tell that the 89170-12D80 is defective?

A fault shows up as the airbag warning light staying on permanently or intermittently, as an error message in the instrument cluster, as no connection between the diagnostic tool and the control unit, or as a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Typical signs at a glance:

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

The warning light is the most direct indication the vehicle gives you. A prompt check will then provide clarity.

Which vehicles is the 89170-12D80 fitted in?

The airbag control unit 89170-12D80 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The models for which this unit is listed are shown in the overview:

• Toyota Corolla E170 (2013-2018)

Compare the part number on the label of the removed unit with this page; this only confirms that you have the right unit. Have the fault memory read out beforehand, because only this log 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 89170-02C70, 89170-12180, 89170-12G10, 89170-12N50.

How does the repair of the 89170-12D80 work?

First have the fault memory read out and attach the log, then disconnect the battery and only afterwards remove the control unit. Then create a repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the unit on the test bench and replaces defective components. The stored crash data are then erased and a function test is carried out.

Your own unit is returned to you afterwards. 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 89170-12D80 get to Airbag24?

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

The printed repair order goes into the parcel. Pack the control unit shockproof so that it survives transport undamaged.