Airbag control unit with part number 89170-24310

What does the airbag control unit 89170-24310 do?

The airbag control unit 89170-24310 coordinates the SRS restraint system of Lexus. In an accident it processes the measured data from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds; during ordinary operation it monitors the system.

It stores and reports faults via the airbag warning light. After an accident, crash data is stored and the control unit then remains locked.

In everyday use you see nothing of this monitoring.

Why does the control unit 89170-24310 fail?

The most common cause of a failure of the 89170-24310 is stored crash data, even if no airbag was triggered. Other factors include aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the memory after a normal diagnostic attempt, because ordinary devices cannot remove it. Airbag24 removes it during the repair.

Electronic components age, solder joints can go cold, and moisture impairs the contacts. Strong voltage spikes, for example from a weak battery or from jump-starting, are also a possible cause.

How can you tell that the 89170-24310 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently when there is a problem with the 89170-24310. A fault also shows itself through an error message, a missing connection to the diagnostic tool or a fault memory that cannot be cleared.

In such a finding, airbags and seatbelt pretensioners may not be triggered in an emergency. The light is therefore a warning signal that must be taken seriously.

Which vehicles is the 89170-24310 fitted in?

Does it fit your car? The control unit 89170-24310 is fitted in these vehicles: Lexus RC ASC10 (2015-2018) and ASC10 Facelift (from 2018).

The list for orientation follows:

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

First compare the part number on the label of the removed unit with this page. That only confirms that you have the right unit. Then have the fault memory read out, because it shows whether the control unit is defective or whether a plug or a cable is behind it.

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 89170-24310 work?

First have the fault memory read out and enclose the log with the unit; then disconnect the battery and remove the control unit 89170-24310. Create the repair order online and pack the unit carefully before sending it in. At Airbag24, processing usually takes 3–4 working days.

On the test bench Airbag24 checks the unit, repairs defective components, deletes the crash data and carries out a function test. Then the 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 89170-24310 get to Airbag24?

You send the control unit 89170-24310 as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

Put the printed repair order into the parcel and pack the control unit shock-proof.