Airbag control unit with part number 89170-02Q50

What does the airbag control unit 89170-02Q50 do?

As the SRS control unit of Toyota, the airbag control unit 89170-02Q50 processes the data from the crash sensors. In an accident it determines within milliseconds which airbags and seatbelt pretensioners are triggered.

It monitors the system continuously. As soon as something is wrong, the airbag warning light in the instrument cluster shows the fault.

After an accident the unit stores crash data and then locks itself.

Why does the control unit 89170-02Q50 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. An ordinary diagnostic tool cannot delete it. In addition, aged components, cold solder joints, moisture at plug connectors and voltage spikes are possible causes for the control unit 89170-02Q50.

The crash data remains in the memory of the control unit. Airbag24 removes it as part of the repair; workshop diagnostic tools do not.

Aged electronics, cold solder joints and moisture at the plugs count among the technical reasons for faults.

Voltage spikes occur, for example, with a weak battery or when a jump start is connected, and can stress the electronics.

How can you tell that the 89170-02Q50 is defective?

You can recognise a defect in the 89170-02Q50 by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In an emergency, airbags and seatbelt pretensioners may then possibly not trigger.

In addition there is an error message in the instrument cluster, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared. Each of these features suggests having the system checked.

The warning light therefore shows the condition directly. Act on it promptly.

Which vehicles is the 89170-02Q50 fitted in?

The control unit 89170-02Q50 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

The list for this part number reads as follows:

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

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out beforehand, because its log shows whether the control unit itself is affected or whether a plug or cable is responsible.

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 89170-02Q50 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit 89170-02Q50. Afterwards create the repair order online and send the unit off well packed.

Airbag24 inspects the unit on the test bench, replaces defective components, deletes the crash data and carries out a function test. Then the unit comes back to you.

For inspection, repair and testing at Airbag24 allow 3–4 working days as a rule. Removal and shipping are not included in this.

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 89170-02Q50 get to Airbag24?

The unit reaches Airbag24 either as a parcel that you send yourself, or by a UPS collection that is booked for an extra charge. After the repair Airbag24 sends your own unit back by UPS.

Put the printed repair order in the parcel and pack the control unit shock-proof.