Airbag control unit with part number 89170-24160

What does the airbag control unit 89170-24160 do?

The airbag control unit 89170-24160 coordinates the restraint system (SRS) in Lexus. It reads the crash sensors and determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light.

While driving, the unit checks the entire chain of sensors, airbags and seatbelt pretensioners without pause. After an accident it stores crash data and locks itself, and this lock ends only with the repair.

Why does the control unit 89170-24160 fail?

The most common cause is crash data stored after an accident, even without a triggered airbag, which a normal diagnostic tool cannot remove. Other causes include ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data cannot simply be switched off with the diagnostic tool. Airbag24 removes it in the course of the repair.

Further causes lie in the electronics and their surroundings. Ageing, cold solder joints, moisture and voltage spikes all belong to them.

How can you tell that the 89170-24160 is defective?

A defect in the 89170-24160 first becomes visible through the airbag warning light, which stays on permanently or intermittently. Fault messages, a missing connection to the diagnostic tool and a fault memory that cannot be cleared are added to this. In an emergency, airbags and seatbelt pretensioners may then fail to fire.

The airbag warning light in the instrument cluster reports the problem as soon as the system detects it. A light that comes on is no coincidence but a clear indication of a fault.

Which vehicles is the 89170-24160 fitted in?

The airbag control unit 89170-24160 is fitted in these vehicles: Lexus RC ASC10 (2015-2018) and ASC10 Facelift (from 2018).

This list shows the models of Lexus for which the control unit was installed.

• Lexus RC ASC10 (2015-2018)
• Lexus RC ASC10 Facelift (from 2018)

First compare the part number on the label with this page. Then have the fault memory read out, because the log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-24170, 89170-24300, 89170-24320, 89170-24340, 89170-78010.

How does the repair of the 89170-24160 work?

Have the fault memory read out and enclose the log. Then disconnect the battery from the vehicle's electrical system and only then remove the control unit 89170-24160. Next, create the repair order online and send the well-packed unit.

Airbag24 examines the unit on the test bench and replaces defective components. The stored crash data is erased, and then the function test follows. Processing usually takes 3–4 working days.

After that your own unit goes back 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 89170-24160 get to Airbag24?

You send the control unit 89170-24160 as a parcel or book a UPS collection for an extra charge. The return after the repair follows by UPS.

Put the printed repair order in the parcel. Pack the control unit so that it lies shock-proof.