Airbag control unit with part number 89170-12E41

What does the airbag control unit 89170-12E41 do?

The airbag control unit 89170-12E41 carries out the evaluation of the restraint system (SRS) in the Toyota. It registers an impact via the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered. At the same time it monitors the system permanently and shows faults via the airbag warning light.

Monitoring takes place throughout operation. Connections, sensors and triggering units are checked again and again.

After an accident the control unit stores crash data and locks itself. The lock is a property of the system.

Why does the control unit 89170-12E41 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or jump-starting.

Crash data cannot be erased with a normal diagnostic tool. During the repair at Airbag24 it is removed.

The remaining causes come from the electronics. Components can age, solder joints can go cold, and moisture and corrosion attack plug connections.

How can you tell that the 89170-12E41 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. A diagnostic tool also finds no connection to the control unit, and the fault memory cannot be cleared.

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

With these faults, airbags and seatbelt pretensioners may fail to trigger in an emergency. Please have the condition checked without delay.

Which vehicles is the 89170-12E41 fitted in?

The 89170-12E41 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The following vehicles are assigned to this part number:

• Toyota Corolla E170 (2013-2018)

Comparing the part number on the label of the removed unit with this page ensures that you have removed the right unit. Whether the control unit is defective, or a plug or cable is the cause, only becomes clear once the fault memory has been read out.

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 89170-12E41 work?

First you have the fault memory read out and attach the log. Then you disconnect the battery and only afterwards remove the 89170-12E41. Next, create a repair order online and send in the unit.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Afterwards your own unit goes back to you. At Airbag24 these steps usually take 3–4 working days.

The sequence protects during removal and is therefore binding.

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 89170-12E41 get to Airbag24?

You send the unit as a parcel or, for an extra charge, book a UPS collection. The printed repair order goes into the parcel, and you pack the control unit shockproof.

After the repair, Airbag24 sends your own unit back by UPS.