Airbag control unit with part number 89170-12E30

What does the airbag control unit 89170-12E30 do?

The airbag control unit 89170-12E30 is the central control unit of the restraint system (SRS) in the Toyota. It evaluates the signals from the crash sensors, decides in an accident within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If the unit detects a fault, it shows it via the airbag warning light in the instrument cluster. This light is therefore the visible sign that something is wrong in the restraint system.

After an accident the control unit stores crash data and then locks itself. In everyday language it is also called the SRS control unit, but it is the same component.

Why does the control unit 89170-12E30 fail?

The most common cause is that crash data was stored in the unit after an accident, even if no airbag has deployed. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible.

A standard diagnostic tool cannot remove this crash data. Airbag24 erases it during the repair.

The other causes in detail:

• aged electronic components in the unit
• cold solder joints on the circuit board
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or when starting with an external power source

How can you tell that the 89170-12E30 is defective?

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

The light shows the defect first; the fault message in the instrument cluster confirms it.

If the light is on, airbags and seatbelt pretensioners may fail to deploy in an emergency. Please have the system checked promptly.

Which vehicles is the 89170-12E30 fitted in?

The 89170-12E30 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

This overview lists the vehicles in which this control unit is installed:

• Toyota Corolla E170 (2013-2018)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out beforehand, because only this result 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 89170-12E30 work?

At Airbag24 processing usually takes 3–4 working days. For your own safety, the order is fixed: first have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit 89170-12E30.

Then create a repair order online and pack the unit well before sending it.

Airbag24 checks the unit on the test bench and replaces defective components. The team then erases the stored crash data and carries out a function test. Afterwards your own unit is sent 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 89170-12E30 get to Airbag24?

You send the control unit 89170-12E30 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the control unit shockproof.