Airbag control unit with part number 89170-0A140

What does the airbag control unit 89170-0A140 do?

The airbag control unit 89170-0A140 controls the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors and, in the event of an accident, decides which airbags and seatbelt pretensioners are triggered. It also monitors the entire system constantly.

The crash sensors continuously send measurement values to the unit, and it checks these values all the time. If it detects a fault in the system, it shows this via the airbag warning light in the instrument cluster. This is how you, as the driver, learn that something is wrong with the restraint system.

After an accident, the control unit stores crash data and locks itself. Only a repair lifts this lock.

Why does the control unit 89170-0A140 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start. With the 89170-0A140, the exact cause can only be narrowed down after testing.

Crash data cannot be erased with a normal diagnostic tool. That is exactly what Airbag24 takes care of: the data is removed during the repair, before the unit goes through the function test.

The other causes work in different ways. Electronic components age over time, solder joints can go cold, and moisture attacks the contacts at plug connectors. Voltage spikes put additional strain on the electronics when the battery is weak or a jump start has been needed.

How can you tell that the 89170-0A140 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, indicating a defect in the 89170-0A140. A fault message may also appear in the instrument cluster. In addition, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared.

If you notice these signs, have the system checked promptly. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy, because the system is not ready to operate safely.

Take the warning light seriously. This way the fault can be narrowed down early and fixed in a targeted way.

Which vehicles is the 89170-0A140 fitted in?

The 89170-0A140 is fitted in these vehicles: Toyota Corolla Cross XG10 (from 2022).

The list below shows the vehicles for which this part number is stored at Airbag24.

• Toyota Corolla Cross XG10 (from 2022)

Compare the part number on the label of the removed unit with this page. This only confirms that you have the correct unit in front of you. Before removal, also have the fault memory read out, because only this log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-0A100, 89170-0A210.

How does the repair of the 89170-0A140 work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the 89170-0A140. Next, create a repair order online and pack the unit well for shipping. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24, the unit is first examined on the test bench. Defective components are repaired, stored crash data is deleted and a function test is carried out. Your own unit is then returned 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 89170-0A140 get to Airbag24?

You send the 89170-0A140 in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Put a printed repair order into the parcel and pack the unit shock-proof.