Airbag control unit with part number 89170-11040

What does the airbag control unit 89170-11040 do?

The airbag control unit 89170-11040 coordinates the restraint system (SRS) for Lexus. It evaluates the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

During operation, the unit continuously checks the system and displays faults via the airbag warning light.

If an accident occurs, it stores crash data and then locks itself.

Why does the control unit 89170-11040 fail?

The most common cause with the 89170-11040 is crash data stored after an accident, even if no airbag was triggered. Aged electronic components, dry solder joints, moisture and corrosion at plug connections, and voltage spikes are additional causes.

A normal diagnostic tool cannot remove this crash data. Airbag24 deletes it during the repair.

Aged electronic components and dry solder joints affect the function without any accident being necessary.

Moisture and corrosion at plug connections reduce conductivity, and voltage spikes from the vehicle electrical system, for example when jump-starting, stress the electronics.

How can you tell that the 89170-11040 is defective?

You can recognise a defect on the 89170-11040 by the airbag warning light, which stays on permanently or intermittently, by a fault message in the instrument cluster, by the diagnostic tool failing to establish a connection, and by a fault memory that cannot be cleared.

If a defect is present, airbags and seatbelt pretensioners may not deploy in an emergency; this is exactly what the warning light is there to signal.

If these signs appear, the next step is an inspection.

Which vehicles is the 89170-11040 fitted in?

The airbag control unit 89170-11040 is fitted in these vehicles: Lexus LC URZ100 (from 2017).

The overview below lists the vehicles assigned to this part number.

• Lexus LC URZ100 (from 2017)

Matching the part number on the label of the unit with this page confirms that you have the right unit. Whether the control unit itself is defective, or a plug or cable is the cause, is shown only by the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 89170-11020, 89170-11140, 89970-50100.

How does the repair of the 89170-11040 work?

Airbag24 needs 3–4 working days for the work, as a rule. Beforehand, have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit 89170-11040 and create a repair order online for the well-packed unit.

At Airbag24 the unit is examined on the test bench, defective components are repaired, the crash data are cleared and a function test is then carried out. After that, you get your own unit back.

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 89170-11040 get to Airbag24?

Shipping to Airbag24 takes place as a parcel that you send yourself, or with a UPS collection booked for an extra charge. After the repair, Airbag24 sends the unit 89170-11040 back by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.