Airbag control unit with part number 89170-12G50

What does the airbag control unit 89170-12G50 do?

The airbag control unit 89170-12G50 belongs to the restraint system (SRS) of the Toyota. It evaluates the signals from the crash sensors, decides within milliseconds on the triggering of the airbags and seatbelt pretensioners, and monitors the system continuously. After a crash, it stores crash data and locks itself.

The unit records faults in the fault memory and reports them via the airbag warning light in the instrument cluster. In this way, the state of the system can be read at any time.

The seatbelt pretensioners are also part of this system. The control unit activates them as soon as triggering becomes necessary.

Why does the control unit 89170-12G50 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot remove it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The crash data is stored in the control unit itself, regardless of whether visible consequences can be seen in the vehicle.

The other causes stem from components that wear over time, from solder joints that can go cold, and from plug contacts that moisture can reach. Voltage spikes additionally attack the circuits.

How can you tell that the 89170-12G50 is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently, an error message appears, the diagnostic tool cannot reach the control unit, or the fault memory cannot be erased. In these cases, airbags and seatbelt pretensioners may possibly fail to trigger in an emergency.

The warning light is the signal you will notice first, and it calls for an inspection whether or not the car still drives normally. If the diagnostic tool gets no contact, the control unit is not automatically to blame; connections can be affected as well.

Which vehicles is the 89170-12G50 fitted in?

The control unit 89170-12G50 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The following list shows the vehicles recorded for this part number:

• Toyota Corolla E170 (2013-2018)

Compare the part number on the label of the removed unit with this page. This only confirms that the part number matches. Have the fault memory read out in addition, because it 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 89170-12G50 work?

Start by having the fault memory read out and attaching the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 takes 3–4 working days as a rule.

At Airbag24, the unit first goes onto the test bench. Defective components are repaired, the crash data is erased afterwards, and a function test follows. Then 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 89170-12G50 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, the unit comes back to you by UPS.

Pack the unit shock-resistant and enclose the printed repair order, and everything is ready.