Airbag control unit with part number 89170-33T60

What does the airbag control unit 89170-33T60 do?

The airbag control unit 89170-33T60 is the central control unit of the restraint system (SRS) in Lexus. It receives the signals from the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system constantly.

It indicates faults via the airbag warning light. After an accident, the unit stores crash data and locks itself.

In everyday use the control unit works unobtrusively in the background.

Why does the control unit 89170-33T60 fail?

Most often the cause is crash data from an accident that has remained in the memory, even if no airbag deployed. Other causes are ageing, cold solder joints, moisture and corrosion at plugs, and voltage spikes.

A standard diagnostic tool cannot delete the crash data. In addition, the following causes may come into consideration:

• ageing of electronic components
• cold solder joints in the unit
• moisture and corrosion at plug connections
• voltage spikes from a weak battery or a jump start

Airbag24 deletes the crash data during the repair. Whether any of these causes applies only becomes clear through the inspection.

How can you tell that the 89170-33T60 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, accompanied by a fault message. In addition, the fault memory cannot be cleared, and the diagnostic tool finds no connection to the control unit.

While this condition persists, airbags and seatbelt pretensioners may fail to trigger in an emergency. An inspection is therefore advisable, even if the vehicle otherwise drives normally.

The light is the visible sign that something is wrong in the restraint system.

Which vehicles is the 89170-33T60 fitted in?

The control unit 89170-33T60 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The following list shows which models are affected.

• Lexus ES AXZH60 (from 2018)

The part number on the removed unit is compared with this page; this only confirms that it is the right unit. Have the fault memory read out before removal. 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 89170-33T60 work?

First read out the fault memory and attach the log. Then disconnect the battery, and only then remove the control unit and create a repair order online. Afterwards send the well-packed unit to Airbag24.

Airbag24 tests the unit on the test bench, deletes the stored crash data, replaces defective components and carries out a function test. Afterwards your own unit is sent back to you.

Processing at Airbag24 usually takes 3–4 working days, counted only for inspection, repair and function testing. 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 89170-33T60 get to Airbag24?

You send the unit as a parcel, or book UPS collection for an extra charge. After the repair, UPS takes the unit from Airbag24 back to you.

Place the printed repair order in the parcel and pack the unit securely against shocks.