Airbag control unit with part number 89170-02P50

What does the airbag control unit 89170-02P50 do?

The airbag control unit 89170-02P50 is the control unit of the restraint system (SRS) in Toyota. It evaluates the signals from the impact sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light.

The monitoring runs continuously, without you having to set anything.

An accident causes the unit to store crash data and lock itself.

Why does the control unit 89170-02P50 fail?

The most common cause is crash data that remains in the unit after an accident, even if no airbag has deployed. Other possible causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Airbag24 erases the crash data during the repair. A normal diagnostic tool cannot do this.

The other causes either act over a long period or occur suddenly, depending on whether it is ageing or a voltage spike.

How can you tell that the 89170-02P50 is defective?

A defect in the 89170-02P50 shows up in signs in the instrument cluster and on the diagnostic tool. In an emergency, airbags and seatbelt pretensioners may then not deploy.

These signs are:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

The warning light is a signal you should keep an eye on during every journey.

Which vehicles is the 89170-02P50 fitted in?

The 89170-02P50 is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

These vehicles are recorded for this part number:

• 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 matching unit. Having the fault memory read out, on the other hand, 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 89170-02N50, 89170-02T10, 89170-02W80, 89170-0F150.

How does the repair of the 89170-02P50 work?

The fault memory is read out as the first step, and the log then belongs to the unit. After that, you disconnect the battery and remove the control unit. Only then do you create the repair order online and send in the well-packed unit.

Airbag24 examines the unit on the test bench. Defective components are repaired or replaced, the stored crash data is erased and a function test is carried out. Processing usually takes 3–4 working days. The 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 89170-02P50 get to Airbag24?

You send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS brings your own unit back to you.

The printed repair order is enclosed in the parcel, and the control unit is packed shock-resistant.