Airbag control unit with part number 89170-60F40

What does the airbag control unit 89170-60F40 do?

The 89170-60F40 is the SRS control unit of the Lexus. It processes the measured values from the crash sensors, determines in an accident which airbags and seatbelt pretensioners fire, and checks the circuits of the system without interruption. It indicates faults via the airbag warning light.

The system consists of several components that only work together. The control unit coordinates them, and the entire restraint system relies on it.

After an accident it stores crash data and locks itself. This lock is removed exclusively by the repair.

Why does the control unit 89170-60F40 fail?

The most common cause: crash data from an earlier accident, even if no airbag deployed. It cannot be deleted with an ordinary diagnostic tool. Other causes include ageing electronics, cold solder joints, moisture at plug connections, and voltage spikes.

These entries remain stored until the repair removes them. They arise regardless of which airbags actually fire.

The other causes interact within the electronics. Components age, solder joints crack, and moisture or corrosion at the plugs disturb the contact. Voltage spikes, for example with a weak battery or when jump-starting, add further strain to the electronics.

How can you tell that the 89170-60F40 is defective?

A defect shows up as the airbag warning light, an error message in the instrument cluster, a diagnostic tool that fails to connect, and a fault memory that cannot be cleared. The warning light is the most important sign.

• Airbag warning light stays on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool fails to establish a connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may fail to deploy. Therefore these signs require a prompt check.

Which vehicles is the 89170-60F40 fitted in?

The control unit 89170-60F40 is fitted in these vehicles: Lexus GX J150 (2009-2013), J150 2nd Facelift (2019-2023) and J150 1st Facelift (2013-2019).

The following overview comes from our data on this part number:

• Lexus GX J150 (2009-2013)
• Lexus GX J150 2nd Facelift (2019-2023)
• Lexus GX J150 1st Facelift (2013-2019)

First, compare the part number on the label of the removed unit with this page. This only establishes that it is the right unit. Then have the fault memory read out beforehand, because only the result shows whether the control unit or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-60620, 89170-60630, 89170-60631, 89170-60F30.

How does the repair of the 89170-60F40 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Then create the repair order online and send in the unit, well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test.

Afterwards your own unit is 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 89170-60F40 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair it is returned to you by UPS.

Enclose the printed repair order in the parcel and pack the unit shockproof.