Airbag control unit with part number 89170-33N10

What does the airbag control unit 89170-33N10 do?

The airbag control unit 89170-33N10 is the central control unit of the restraint system (SRS) for Lexus. It checks the signals from the crash sensors, decides in a crash within fractions of a second whether airbags and seatbelt pretensioners are triggered, and reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

Monitoring runs without interruption. To do this, the unit continuously checks the wiring to the sensors and to the trigger units.

Why does the control unit 89170-33N10 fail?

Stored crash data are the most common cause: they remain in memory after an accident even if no airbag has deployed, and a normal diagnostic tool cannot delete them. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 deletes the crash data during the repair. The other causes affect the electronics themselves and their connections.

Voltage spikes arise, for example, from a weak battery or when a jump start is connected.

How can you tell that the 89170-33N10 is defective?

A defect shows itself through an airbag warning light that lights up continuously or intermittently, an error message in the instrument cluster, and a diagnostic tool that cannot establish a connection. Airbags and seatbelt pretensioners may then possibly fail to deploy in an emergency.

• Airbag warning light lights up continuously or intermittently
• Error message in the instrument cluster
• Diagnostic tool finds no connection to the control unit
• Fault memory cannot be cleared

Have such signs checked rather than ignoring the light.

Which vehicles is the 89170-33N10 fitted in?

The 89170-33N10 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

Here follows the list of known vehicles for this part number.

• Lexus ES AXZH60 (from 2018)

Compare the part number on the label of the removed unit with this page; that tells you that it is the right unit. Also have the fault memory read out before removing anything, because only it 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 89170-33N10 work?

Processing at Airbag24 takes 3–4 working days as a rule. Beforehand, have the fault memory read out, enclose the log, disconnect the battery and only then remove the control unit. Then create a repair order online and send the unit in well packed.

At Airbag24 the unit is checked on the test bench, defective components are replaced, stored crash data are deleted and a function test is carried out. Then your own unit comes 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 89170-33N10 get to Airbag24?

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

Pack the printed repair order into the parcel and wrap the unit so that it is shock-resistant.