Airbag control unit with part number 89170-12280

What does the airbag control unit 89170-12280 do?

In the Toyota, the airbag control unit 89170-12280 is part of the control of the restraint system (SRS). It evaluates the signals from the crash sensors, selects the correct airbags and seatbelt pretensioners in a crash, and monitors the condition of the system continuously. If it detects a fault, it reports it via the airbag warning light.

The decision in a crash has to be made in milliseconds, which is why monitoring runs without a break.

After an accident the unit stores crash data and locks itself, and the lock is only lifted by the repair.

Why does the control unit 89170-12280 fail?

The most common cause is crash data from an accident, even when no airbag has deployed; a normal diagnostic tool does not erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Crash data remains stored even when the vehicle appears undamaged from the outside.

The other factors act over time or through the power supply. Damp connectors and old solder joints lead to intermittent contact, and voltage spikes occur, for example, with a weak battery or when jump-starting.

How can you tell that the 89170-12280 is defective?

The airbag warning light stays on permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool cannot reach the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners could then possibly fail to deploy.

The warning light is the most important warning sign you have in the vehicle. It indicates a fault in the restraint system and should therefore not be ignored.

Only a check can establish whether the control unit or a cable is affected.

Which vehicles is the 89170-12280 fitted in?

The control unit 89170-12280 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

The vehicles known for this part number are shown in the list below.

• Toyota Corolla E170 (2013-2018)

On the one hand, comparing the part number on the label confirms that you have the correct unit in front of you. On the other hand, only the fault memory, which you have read out beforehand, shows whether the control unit is defective or whether a connector or a cable is behind it.

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 89170-12280 work?

First have the fault memory read out and include the log. Then disconnect the battery, remove the control unit 89170-12280 only afterwards, and create a repair order online. Finally, send in the well-packed unit.

At Airbag24 the unit goes on the test bench, damaged parts are replaced, the crash data is erased and the function is tested. Processing there usually takes 3–4 working days; afterwards your own unit is returned to you.

The order of these steps serves your safety and must therefore be observed. 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 89170-12280 get to Airbag24?

You send the unit by parcel or book a UPS collection for an extra charge. The return after the repair is made via UPS.

The printed repair order goes in the parcel, and the control unit is packed shockproof.