Airbag control unit with part number 89170-12A70

What does the airbag control unit 89170-12A70 do?

The 89170-12A70 acts as the airbag control unit for the restraint system (SRS) of Toyota. In an impact it reads the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners fire.

In normal operation it checks all connected components continuously and shows faults via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself.

Why does the control unit 89170-12A70 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. In addition, ageing components, cold solder joints, moisture and corrosion at connectors, and voltage spikes can cause the 89170-12A70 to fail.

Crash data stays stored in the unit after an accident, and a normal diagnostic tool cannot delete it. During the repair Airbag24 removes it reliably, before the control unit is checked and put back into operation.

The other causes concern the electronics themselves or their power supply. A weak battery or a jump start can produce voltage spikes that affect individual components, and moisture in the connectors disturbs the contact between the unit and the wiring harness.

How can you tell that the 89170-12A70 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared.

If any of these signs appears, airbags and seatbelt pretensioners may not deploy in an emergency. The warning light indicates the defect and must not be ignored, even if the car otherwise drives normally.

Which vehicles is the 89170-12A70 fitted in?

The 89170-12A70 is fitted in these vehicles: Toyota Auris E180 (2012-2015) and E180 Facelift (2015-2019).

The vehicles at a glance:

• Toyota Auris E180 (2012-2015)
• Toyota Auris E180 Facelift (2015-2019)

Compare the part number on the label of the removed unit with this page, because that only confirms that it is the correct unit. Have the fault memory read out beforehand. Only this result shows whether the control unit is defective or whether a connector or cable is the actual cause.

For the same vehicles, we also repair control units with the part numbers 152100-4560, 222814-101, 89170-02J70, 89170-0W330, 8917002890, 8917012730.

How does the repair of the 89170-12A70 work?

First have the fault memory read out and enclose the readout log. Then disconnect the battery and only then remove the 89170-12A70. Next, create a repair order online.

Pack the unit well and send it in. Airbag24 checks it on the test bench, replaces defective components, deletes the crash data and carries out a function test. For checking, repairing and testing at Airbag24, 3–4 working days are generally planned, after which your own unit comes 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 89170-12A70 get to Airbag24?

You can send the 89170-12A70 as a parcel, or you can book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Place the printed repair order in the parcel, and pack the control unit shockproof so that it survives transport undamaged.