Airbag control unit with part number 89170-02W00

What does the airbag control unit 89170-02W00 do?

The airbag control unit 89170-02W00 coordinates the airbags and seatbelt pretensioners of Toyota. It receives the signals from the crash sensors, decides on triggering within milliseconds in a collision, and monitors the entire restraint system continuously. A detected fault appears via the airbag warning light. After an accident, it secures crash data and locks itself.

The monitoring runs in the background, and in normal operation you notice nothing of it. The unit only signals when it has detected something.

Why does the control unit 89170-02W00 fail?

For the 89170-02W00, the most common cause is stored crash data after an accident, even if no airbag has deployed. A normal diagnostic tool does not erase this data. Ageing, cold solder joints, moisture and corrosion on plugs, and voltage spikes are also possible causes.

Crash data stays in the unit without you feeling anything. That is why it is the starting point of every fault search.

Electronic components age, and over time the connections at solder joints or plug contacts can deteriorate. A weak battery or a jump start leads to voltage spikes that can affect the electronics.

How can you tell that the 89170-02W00 is defective?

A problem with the 89170-02W00 is first noticed on the airbag warning light in the instrument cluster, which stays on permanently or only now and then. Add to that a fault message, a diagnostic tool without contact to the control unit, and a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

Specifically, this means:

• The airbag warning light is on permanently or keeps coming on
• The instrument cluster shows a fault message
• A diagnostic tool does not find the control unit
• The fault memory cannot be cleared

Any one of these signs is reason enough for a thorough check.

Which vehicles is the 89170-02W00 fitted in?

The airbag control unit 89170-02W00 is fitted in a range of vehicles by Toyota. It is fitted in these vehicles: Toyota Corolla E210 (2018-2022) and E210 Facelift (from 2022).

The overview below lists the vehicles we have on record for this part number.

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

Compare the part number on the label of the removed unit with this page; this establishes only that it is the correct unit. Also have the fault memory read out in advance. Only this result shows whether the control unit itself is defective or whether a connector 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 89170-02W00 work?

First have the fault memory of the 89170-02W00 read out and attach the log to the unit. Only then disconnect the battery and remove the control unit. Next, create a repair order online and send in the packed unit. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24, the unit is examined on the test bench, defective components are repaired, stored crash data is erased, and a functional test follows.

Afterwards, you receive your own unit back.

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 89170-02W00 get to Airbag24?

The 89170-02W00 reaches Airbag24 either as a parcel or with a UPS collection that you book for an extra charge. After the repair, the unit comes back to you via UPS.

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