Airbag control unit with part number 89170-48580

What does the airbag control unit 89170-48580 do?

The airbag control unit 89170-48580 controls the restraint system (SRS) of Lexus. It evaluates the crash sensors, selects within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

It reports faults via the airbag warning light in the instrument cluster. To do so it is directly connected to sensors, airbags and seatbelt pretensioners.

Why does the control unit 89170-48580 fail?

The most common cause is crash data that remain stored after an accident, even if no airbag has been triggered. In addition there are ageing of the electronics, cold solder joints, moisture, corrosion and voltage spikes. Airbag24 removes the crash data as part of the repair.

• ageing electronic components
• faulty solder joints
• moisture and corrosion at plugs
• voltage spikes in the vehicle electrical system

The crash data remain stored in the control unit, and a normal diagnostic tool cannot change that.

How can you tell that the 89170-48580 is defective?

A defect first shows itself through the airbag warning light, which lights up permanently or intermittently. A fault message in the instrument cluster, a diagnostic tool without connection and a fault memory that cannot be cleared come in addition. Airbags and seatbelt pretensioners may then not be able to deploy in an emergency.

• airbag warning light that lights up permanently or intermittently
• fault message in the instrument cluster
• no connection between diagnostic tool and control unit
• fault memory that cannot be cleared

If you notice any of these signs, have the cause checked promptly.

Which vehicles is the 89170-48580 fitted in?

The control unit 89170-48580 is fitted in these vehicles: Lexus RX AL10 Facelift (2012-2015) and AL10 (2009-2012).

The list below shows the vehicles known for this part number.

• Lexus RX AL10 Facelift (2012-2015)
• Lexus RX AL10 (2009-2012)

You can compare the part number on the label of the removed unit with this page; that only confirms the identity of the unit. Have the fault memory read out beforehand. Only this log shows whether the control unit is defective or whether a plug or a cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 1503001853, 8917048380.

How does the repair of the 89170-48580 work?

At the start the fault memory is read out, and its log is enclosed with the unit. The battery is then disconnected and the unit removed. Processing at Airbag24 usually takes 3–4 working days.

The order is binding, because safety comes first with the airbag system. Create the repair order online and then pack the unit carefully.

Airbag24 checks the control unit on the test bench, rectifies the defect in the affected components, erases the stored crash data and carries out a function test. Your own unit is then returned. The stated 3–4 working days apply only to this work.

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 89170-48580 get to Airbag24?

You send the control unit 89170-48580 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Pack the unit shock-proof and include the printed repair order.