Airbag control unit with part number 89170-02D51

What does the airbag control unit 89170-02D51 do?

The airbag control unit 89170-02D51 coordinates the SRS in the Toyota vehicle. In an accident, it decides within milliseconds which airbags and seatbelt pretensioners are triggered, and it monitors the system continuously.

It shows detected faults via the airbag warning light in the instrument cluster.

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

Why does the control unit 89170-02D51 fail?

For the 89170-02D51, the most common cause is stored crash data after an accident, even if no airbag was deployed. A normal diagnostic tool cannot erase this data. Further causes are aged components, cold solder joints, moisture and voltage spikes.

Electronics age, and solder joints can become susceptible over time.

Moisture and corrosion attack plug connections, and voltage spikes occur, for example, when starting with an external power source.

How can you tell that the 89170-02D51 is defective?

An airbag warning light in the instrument cluster that stays on permanently or intermittently indicates the most important fault on the 89170-02D51. Fault messages in the instrument cluster and a fault memory that cannot be cleared are also signs.

• Airbag warning light is on intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to deploy, so this warning must be taken seriously.

Which vehicles is the 89170-02D51 fitted in?

Check beforehand whether your vehicle matches. The control unit 89170-02D51 is fitted in these vehicles: Toyota Corolla E140 (2006-2013) and E150 (2006-2013).

The vehicles at a glance:

• Toyota Corolla E140 (2006-2013)
• Toyota Corolla E150 (2006-2013)

Comparing the part number on the label of the removed unit only confirms that it is the right unit. Reading out the fault memory 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 89170-02810, 89170-02830, 89170-02840, 89170-02860, 89170-02870, 89170-02A90.

How does the repair of the 89170-02D51 work?

First have the fault memory of the 89170-02D51 read out and enclose the log. Then disconnect the battery before removing the control unit. Next, create a repair order online and send in the unit.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Afterwards, your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days. 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 89170-02D51 get to Airbag24?

You send the control unit 89170-02D51 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order in the parcel and pack the unit shockproof.