Airbag control unit with part number 89170-76180

What does the airbag control unit 89170-76180 do?

The airbag control unit 89170-76180 is the central control unit of the SRS for Lexus. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition it monitors the components of the system. It shows faults via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself. The repair is the way to lift this lock.

Why does the control unit 89170-76180 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Aged electronics, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes are also possible causes.

Airbag24 erases the crash data during the repair. Until then it remains in the memory of the unit.

Aged electronics and cold solder joints can cause faults. Moisture and corrosion on the plug connectors impair the contact.

Voltage spikes arise, for example, from a weak battery or a jump start and stress the electronics.

How can you tell that the 89170-76180 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, and a fault message appears. In addition, the diagnostic tool cannot establish a connection to the control unit 89170-76180, and the fault memory cannot be cleared.

The warning light is the most important warning sign on the dashboard. It signals faults in the restraint system.

With such a defect, airbags and seatbelt pretensioners may not deploy in an emergency.

Which vehicles is the 89170-76180 fitted in?

The control unit 89170-76180 is fitted in these vehicles: Lexus CT ZWA10 (2011-2022).

Here you can see which vehicles the unit is intended for:

• Lexus CT ZWA10 (2011-2022)

Compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Have the fault memory read out beforehand, because only 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 89170-02C30, 89170-76160, 89170-76210, 89170-76220.

How does the repair of the 89170-76180 work?

First have the fault memory read out and attach the log, then disconnect the battery. Only then remove the control unit 89170-76180. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days.

After the repair your own unit is returned 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 89170-76180 get to Airbag24?

You send the control unit 89170-76180 as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

The printed repair order goes into the parcel, and you pack the unit shock-proof.