Airbag control unit with part number 89170-33C30

What does the airbag control unit 89170-33C30 do?

The airbag control unit 89170-33C30 coordinates the SRS restraint system for Lexus. It evaluates the crash sensors and triggers the intended airbags and seatbelt pretensioners within milliseconds.

During normal operation it also monitors the system. It indicates faults via the airbag warning light in the instrument cluster.

After an accident the unit records crash data and locks itself. The lock is only lifted by a repair.

Why does the control unit 89170-33C30 fail?

Stored crash data is the most common cause, even when no airbag has deployed. A normal diagnostic tool cannot erase it from the 89170-33C30. Other triggers are ageing components, cold solder joints, moisture and voltage spikes.

The data is stored in the control unit itself and remains there until Airbag24 erases it during the repair.

Electronic components age over time. Solder joints can go cold, and moisture or corrosion attack the contacts at the plug connections.

Voltage spikes occur, for example, with a weak battery or when a jump start is connected, and they can put a strain on the unit.

How can you tell that the 89170-33C30 is defective?

A defect in the 89170-33C30 generally shows through signs in the instrument cluster and on the diagnostic tool.

The signs in detail:

• airbag warning light, permanently or intermittently
• fault message in the instrument cluster
• missing connection between the diagnostic tool and the control unit
• fault memory that cannot be cleared

In a crash, airbags and seatbelt pretensioners may then fail to trigger. Please arrange a check promptly.

Which vehicles is the 89170-33C30 fitted in?

The airbag control unit 89170-33C30 is fitted in these vehicles: Lexus ES AXZH60 (from 2018). The part number on the label of the removed unit is the reference for the assignment.

The following vehicles belong to this part number:

• Lexus ES AXZH60 (from 2018)

Comparing the label confirms that you have the correct unit in front of you, and nothing more. Only the fault memory read out beforehand shows whether the control unit is defective or whether a plug or a cable is behind the fault.

For the same vehicles, we also repair control units with the part numbers 89170-06590, 89170-06880.

How does the repair of the 89170-33C30 work?

The process starts with reading out the fault memory, and you add the record to the parcel. Then you disconnect the battery, remove the control unit 89170-33C30, create the repair order online and pack the unit carefully. Processing at Airbag24 usually takes 3–4 working days.

At the test bench Airbag24 checks the unit and replaces defective components. The crash data is then erased and a functional test is carried out.

Afterwards 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 89170-33C30 get to Airbag24?

You can send the control unit 89170-33C30 in as a parcel, or have it collected by UPS for an extra charge. After the repair Airbag24 returns it by UPS.

Pack the unit so that it is shock-resistant and include the printed repair order.