Airbag control unit with part number 89170-76530

What does the airbag control unit 89170-76530 do?

The airbag control unit 89170-76530 is the central component of the SRS restraint system for Lexus. From the signals of the crash sensors, it calculates within milliseconds which airbags and seatbelt pretensioners are triggered in an accident.

In addition, it checks the system during operation and reports faults via the airbag warning light in the instrument cluster.

After an accident, the control unit writes crash data to its memory and locks itself. Only the repair lifts the lock.

Why does the control unit 89170-76530 fail?

The most common cause is crash data stored in the unit after an accident, even without a triggered airbag. Further causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes in the vehicle electrical system.

A normal diagnostic tool cannot erase this crash data. Airbag24 erases it during the repair.

The other causes mainly concern the electronics and their connections. Aged components and cold solder joints belong here, while moisture and corrosion attack the plugs. Voltage spikes arise, for example, from a weak battery or when starting with external power.

How can you tell that the 89170-76530 is defective?

A defect in the 89170-76530 shows up as an airbag warning light in the instrument cluster that lights up permanently or intermittently. An error message in the instrument cluster, a diagnostic tool without a connection to the control unit and a fault memory that cannot be cleared also point to a defect.

In a real emergency, airbags and seatbelt pretensioners may fail to deploy in such a case. The warning light is therefore a clear signal that you should take seriously.

The diagnostic tool reads out the fault memory and shows which faults are stored.

Which vehicles is the 89170-76530 fitted in?

The 89170-76530 is fitted in these vehicles: Lexus UX MZAA10 (from 2018).

In our assignment, the following vehicles are recorded for this part number:

• Lexus UX MZAA10 (from 2018)

Compare the part number on the label of the removed unit with this page, so you can see that you have the correct unit in front of you. Have the fault memory read out beforehand, because only this log shows whether the control unit is defective or whether a plug or a cable is the cause.

How does the repair of the 89170-76530 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Next, create a repair order online and send in the unit well packed.

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 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 89170-76530 get to Airbag24?

You send the control unit 89170-76530 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Place the printed repair order in the parcel and pack the unit shock-proof.