Airbag control unit with part number 89170-42670

What does the airbag control unit 89170-42670 do?

The airbag control unit 89170-42670 forms the control of the restraint system (SRS) in Toyota. The signals from the crash sensors converge there, and the unit decides which airbags and seatbelt pretensioners fire in an accident. After an accident it stores crash data and locks itself.

It also monitors the condition of the entire system. If it detects a fault, this is shown via the airbag warning light.

The control therefore works without interruption, even if you notice nothing of it.

Why does the control unit 89170-42670 fail?

In the 89170-42670 the most frequent cause is crash data that remains in memory after an accident, even when no airbag has deployed. Other causes lie within the unit itself.

Crash data cannot be erased with an ordinary diagnostic tool. The other causes in detail:

• Aging of the electronics
• Solder joints that have come loose
• Moisture or corrosion at plug connectors
• Voltage spikes when starting or when jump-starting

How can you tell that the 89170-42670 is defective?

A defect in the 89170-42670 shows up as the airbag warning light that stays on permanently or intermittently, as fault messages in the instrument cluster, or as a diagnostic tool that cannot make contact. A fault memory that cannot be cleared also belongs to this. In that case the airbags and seatbelt pretensioners may not deploy in an emergency.

Pay particular attention to these signs:

• Warning light that stays on permanently or intermittently
• Message in the display with a fault notice
• No data exchange between diagnostic tool and control unit
• Fault memory that cannot be cleared

Have the fault memory read out as soon as any of these occurs. The result shows what the cause is.

Which vehicles is the 89170-42670 fitted in?

The airbag control unit 89170-42670 is used in these vehicles: Toyota RAV4 XA40 (2013-2016) and XA40 Facelift (2016-2018).

The vehicles in detail:

• Toyota RAV4 XA40 (2013-2016)
• Toyota RAV4 XA40 Facelift (2016-2018)

Compare the part number with the label on the removed unit to check whether it is the right unit. Whether a defect is present is shown only by the fault memory. Whether a plug or cable is the cause is likewise clarified only there.

For the same vehicles, we also repair control units with the part numbers 89170-42400, 89170-42430, 89170-42480.

How does the repair of the 89170-42670 work?

First have the fault memory read out and attach the log before you remove the control unit 89170-42670. Then disconnect the battery, and create the repair order online. At Airbag24 processing usually takes 3–4 working days.

Send the well-packed unit afterwards. Airbag24 examines it on the test bench, repairs the defective components, erases the crash data and carries out a function test. Your own 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 89170-42670 get to Airbag24?

You send the control unit 89170-42670 in as a parcel or book a UPS collection for an extra charge. After the repair it goes back to you by UPS.

The printed repair order belongs in the parcel. Pack the unit shock-resistantly before handing it over.