Airbag control unit with part number 89170-02D53

What does the airbag control unit 89170-02D53 do?

The airbag control unit 89170-02D53 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, decides within milliseconds in the event of an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

It reports faults via the airbag warning light. The unit also works in the background while driving, not only in an emergency.

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

Why does the control unit 89170-02D53 fail?

Stored crash data after an accident are the most common cause with the 89170-02D53, even if no airbag has deployed; a normal diagnostic tool cannot erase them. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remain in the unit until they are removed during the repair. Only the test shows which other causes are actually present.

The remaining causes relate to the electronics. Components age, solder joints can go cold, and moisture or corrosion disrupt signal transmission. Voltage spikes arise, for example, from a weak battery or when starting with a jump-start.

How can you tell that the 89170-02D53 is defective?

A defect in the 89170-02D53 shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. An error message also appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared.

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

With these signs, the airbags and seatbelt pretensioners may not trigger in an emergency. The warning light indicates the defect, so it makes sense to have the fault checked promptly.

Which vehicles is the 89170-02D53 fitted in?

The control unit 89170-02D53 is fitted in these vehicles: Toyota Corolla E140 (2006-2013) and E150 (2006-2013). The overview lists the vehicles we have on record for this number.

The list is here.

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

Compare the part number on the label of the removed unit with this page to make sure you have the right unit. Also have the fault memory read out beforehand, because only this log shows whether the control unit is defective or 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 89170-02D53 work?

Have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit 89170-02D53. Next, create a repair order online and send in the unit well packed. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24, the team checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Then your own unit is sent back to you.

The stated time covers only the checking, repairing and testing at Airbag24, not the removal or the shipping. 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 89170-02D53 get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the control unit 89170-02D53 by UPS.

Put the printed repair order into the parcel, and pack the unit shock-proof.