Airbag control unit with part number 89170-48670

What does the airbag control unit 89170-48670 do?

The airbag control unit 89170-48670 is the evaluation unit of the restraint system (SRS) in Toyota vehicles. It processes the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered. It reports faults via the airbag warning light.

The unit monitors the restraint system continuously. After an accident it stores crash data and locks itself.

Whether a fault is present can become apparent from the displays in the instrument cluster.

Why does the control unit 89170-48670 fail?

The most common cause of the control unit 89170-48670 is crash data after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase it.

Beyond that there are other, general causes. Airbag24 erases the crash data during the repair, while the other causes are clarified by Airbag24 during the inspection.

The general causes include aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes from a weak battery or a jump start.

How can you tell that the 89170-48670 is defective?

Typical signs of a defect on the 89170-48670 are an airbag warning light that stays on permanently or intermittently, along with error messages in the instrument cluster. A diagnostic tool without a connection or a fault memory that cannot be cleared also indicate a defect.

• Airbag warning light in the instrument cluster
• Error message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

Anyone who notices such signs should not wait long before having it checked. In an emergency, airbags and seatbelt pretensioners may fail to deploy.

Which vehicles is the 89170-48670 fitted in?

The control unit 89170-48670 is fitted in these vehicles: Toyota Highlander XU40 (2007-2013).

Below you will find an overview of the vehicles stored for this part number.

• Toyota Highlander XU40 (2007-2013)

It is advisable to have the fault memory read out in advance. Afterwards compare the part number on the label of the removed unit with the overview, so that it is clear whether the control unit itself or a plug or a cable is affected.

For the same vehicles, we also repair control units with the part numbers 89170-48090, 89170-48240.

How does the repair of the 89170-48670 work?

Before removal, read out the fault memory and keep the log ready. Then disconnect the battery, remove the control unit 89170-48670 and create a repair order online. Send the unit in well packed.

At Airbag24 the unit is examined on the test bench, defective components are repaired, and the crash data is erased. Finally a functional test follows, and then your own unit goes back to you.

Processing at Airbag24 generally 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 89170-48670 get to Airbag24?

Either you send the control unit 89170-48670 in as a parcel, or you book a UPS collection for an extra charge. After the repair UPS brings the unit back to you.

The printed repair order goes into the parcel, along with a shock-proof box around the unit.