Airbag control unit with part number 89170-02M50

What does the airbag control unit 89170-02M50 do?

The airbag control unit 89170-02M50 coordinates the entire restraint system (SRS) in Toyota. From the crash sensor signals it calculates within milliseconds which airbags and seatbelt pretensioners must be triggered.

It monitors the wiring and components continuously. If it detects a fault, it activates the airbag warning light so that you notice the fault.

After an accident, it writes crash data to its memory and locks itself. Only the repair lifts the lock.

Why does the control unit 89170-02M50 fail?

Most often the cause is crash data from an accident, even if no airbag has deployed, because a normal diagnostic tool cannot erase it. Aged components, moisture and voltage spikes are further causes to consider.

The crash data remains stored until Airbag24 removes it during the repair. The other causes can be grouped into four categories:

• Aged electronic components that weaken after prolonged use
• Cold solder joints on the circuit board
• Moisture and corrosion at the plug connections
• Voltage spikes, for example with a weak battery or when starting with a jump start

How can you tell that the 89170-02M50 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and a fault message appears on the display. In addition, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

Such a picture is a clear sign that you should not ignore. Have the fault memory read out before you replace any parts or disconnect any plugs.

Which vehicles is the 89170-02M50 fitted in?

The part number 89170-02M50 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022). The details apply to vehicles of the make Toyota.

The vehicles stored for this part number are listed here:

• Toyota Corolla E210 (2018-2022)
• Toyota Corolla E210 Facelift (from 2022)

Compare the number on the label of the removed unit with this page. This only confirms that you have the correct unit. Whether the control unit is defective or a cable is the cause is shown only by reading out the fault memory before removal.

For the same vehicles, we also repair control units with the part numbers 89170-02N50, 89170-02T10, 89170-02W80, 89170-0F150.

How does the repair of the 89170-02M50 work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the unit and create a repair order online. Processing at Airbag24 usually takes 3–4 working days.

Send in the well-packed unit. Airbag24 then examines it on the test bench, repairs the affected components, erases the stored crash data and carries out a functional test.

After the test, the repaired unit goes 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 89170-02M50 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it via UPS.

Place the printed repair order in the parcel. Pack the control unit shock-proof.