Airbag control unit with part number 89170-33S80

What does the airbag control unit 89170-33S80 do?

The airbag control unit 89170-33S80 belongs to the restraint system (SRS) of Lexus and controls it. The signals from the crash sensors are evaluated in it, and within milliseconds it decides which airbags and seatbelt pretensioners are triggered.

During operation the unit checks the system continuously and reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

Why does the control unit 89170-33S80 fail?

Stored crash data is the most common cause of a failure, even if no airbag was triggered. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

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

The remaining causes concern solder joints, contacts and components that age over time. Moisture attacks plug connections, which is why the condition of the contacts is an important point in every assessment.

How can you tell that the 89170-33S80 is defective?

A defect shows itself first in the airbag warning light in the instrument cluster, which lights up constantly or intermittently, and in an error message in the instrument cluster. The diagnostic tool then also finds no connection to the control unit, and the fault memory cannot be cleared.

As long as this is the case, airbags and seatbelt pretensioners may fail to deploy in an emergency. The light makes the condition clearly visible, so a check should not be delayed.

Which vehicles is the 89170-33S80 fitted in?

The airbag control unit 89170-33S80 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

What is recorded for this part number is listed here.

• Lexus ES AXZH60 (from 2018)

Comparing the part number on the label with this page only confirms that you have removed the right unit. Before you remove the control unit, have the fault memory read out. Only this result 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 89170-06820, 89170-06850, 89170-06880, 89170-33B90, 89170-33C30, 89170-33C50.

How does the repair of the 89170-33S80 work?

You have the fault memory read out, enclose the log, disconnect the battery and only then remove the control unit. Afterwards you 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 stored crash data and carries out a function test; processing there usually takes 3–4 working days.

After that, your own unit is returned to you. The time stated refers solely to the work at Airbag24.

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 89170-33S80 get to Airbag24?

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

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