Airbag control unit with part number 89170-76570

What does the airbag control unit 89170-76570 do?

The airbag control unit 89170-76570 runs the SRS restraint system of Lexus. It receives measurements from the crash sensors, determines in an accident which airbags and seatbelt pretensioners are triggered, and reports faults to the airbag warning light.

It checks the system continuously. After an accident, it stores crash data and then locks itself.

In everyday use, the function remains hidden as long as no fault occurs.

Why does the control unit 89170-76570 fail?

With the 89170-76570, stored crash data most often leads to a failure, even if no airbag has deployed. A normal diagnostic tool cannot remove it. Aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also added.

Airbag24 removes this data as part of the repair.

Other causes arise over time or through voltage spikes, for example during jump-starting.

How can you tell that the 89170-76570 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-76570 either permanently or flickers intermittently. Fault messages in the instrument cluster, a missing connection to the diagnostic tool and a fault memory that cannot be cleared may also occur. In an emergency, airbags and seatbelt pretensioners may therefore fail to deploy.

The warning light is a signal that the system itself sets.

If the connection to the diagnostic tool is missing, the cause may lie in the wiring; the check will establish exactly that.

Which vehicles is the 89170-76570 fitted in?

The 89170-76570 is fitted in these vehicles: Lexus UX MZAA10 (from 2018).

This list shows which vehicles belong to it:

• Lexus UX MZAA10 (from 2018)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Having the fault memory read out before you remove the control unit, however, shows whether it is defective itself or whether a connector or cable is affected.

How does the repair of the 89170-76570 work?

For the 89170-76570, first have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create a repair order online and send it off well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. Stored crash data is deleted and a functional test follows. Afterwards, your own unit is returned.

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 89170-76570 get to Airbag24?

You can send the control unit 89170-76570 in as a parcel or book a UPS collection for an extra charge; after the repair it comes back to you by UPS.

The repair order is printed and goes into the parcel; pack the unit shockproof.