Airbag control unit with part number 89170-48110

What does the airbag control unit 89170-48110 do?

The airbag control unit 89170-48110 belongs to the SRS in Toyota vehicles. It evaluates the crash sensors, decides within milliseconds on triggering the airbags and seatbelt pretensioners, and monitors the system continuously. After an accident, it stores crash data and locks itself.

If it detects a fault, it reports this to the airbag warning light.

This means it is one of the components whose function directly matters in an accident.

Why does the control unit 89170-48110 fail?

Stored crash data is the most common cause with 89170-48110, even when no airbag was triggered. A normal diagnostic tool cannot remove it. In addition there are ageing, cold solder joints, moisture and corrosion on the plugs, and voltage spikes.

Crash data is therefore an obvious reason when the unit becomes conspicuous after an accident. Airbag24 erases it as part of the repair.

The other causes concern ageing, contacts and the power supply. Over time components age, solder joints can cause contact faults, and moisture disrupts plug connections.

How can you tell that the 89170-48110 is defective?

A defect on the 89170-48110 shows up as the airbag warning light, which lights up permanently or intermittently, and as an error message in the instrument cluster. In addition, the diagnostic tool may be unable to establish a connection to the control unit, or the fault memory cannot be erased. In this case, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

• Airbag warning light, permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool cannot connect to the control unit
• Fault memory cannot be erased

As soon as one of these signs appears, have the fault memory read out so that you know what the cause is.

Which vehicles is the 89170-48110 fitted in?

The control unit 89170-48110 is not fitted in every Toyota model. It is fitted in these vehicles: Toyota Highlander XU20 Facelift (2004-2007) and XU20 (2001-2003).

Here is the list of vehicles we know for this number.

• Toyota Highlander XU20 Facelift (2004-2007)
• Toyota Highlander XU20 (2001-2003)

You do the label comparison on the removed unit; this only confirms that it is the right unit. Have the fault memory read out beforehand, because only this log shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-48010, 89170-48011, 89170-48020, 89170-48090, 89170-48150.

How does the repair of the 89170-48110 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery from the power supply, and only then remove the control unit 89170-48110. Then create a repair order online and pack the unit well for sending in. At Airbag24, checking, repairing and testing usually take 3–4 working days.

Airbag24 examines the control unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards your own unit goes back 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 89170-48110 get to Airbag24?

You send the unit to us as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS brings the control unit 89170-48110 back to you.

The printed repair order goes into the parcel, and you pack the unit shock-proof.