Airbag control unit with part number 89170-33E30

What does the airbag control unit 89170-33E30 do?

The airbag control unit 89170-33E30 controls the restraint system (SRS) of Lexus in the vehicle. It reads the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds of an impact, and monitors the system continuously. Faults are shown via the airbag warning light.

The control unit is in operation at all times and logs detected faults. This allows a workshop to check specifically later on.

After an accident the unit records crash data and locks itself.

Why does the control unit 89170-33E30 fail?

Crash data from an accident are the most common cause of failure on the 89170-33E30, even if no airbag fired; a standard diagnostic tool does not remove them. Other causes include aged electronic components, cold solder joints, moisture and corrosion at connectors, and voltage spikes.

Until the repair, crash data remain stored in the unit.

The further causes at a glance:

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at connectors
• Voltage spikes, for example from a weak battery or a jump start

How can you tell that the 89170-33E30 is defective?

The airbag warning light in the instrument cluster indicates a defect on the 89170-33E30 by lighting up permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The airbag warning light is the first indication you will notice. When it comes on, have the vehicle checked rather than ignoring the display.

Which vehicles is the 89170-33E30 fitted in?

The control unit 89170-33E30 is fitted in these vehicles: Lexus ES AXZH60 (from 2018). Whether your car is included can be clarified from the details in the vehicle documents.

The vehicles in detail:

• Lexus ES AXZH60 (from 2018)

Compare the part number on the label of the removed unit with this page, so that you know it is the right unit. Also have the fault memory read out beforehand, because only this result shows whether the control unit itself is the cause or whether a connector or cable is affected.

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 89170-33E30 work?

First have the fault memory of the 89170-33E30 read out and enclose the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

After the examination at Airbag24, defective components are replaced and stored crash data are erased. A functional test concludes the process, after which your own unit comes back to you.

The first sequence of steps is mandatory. 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 89170-33E30 get to Airbag24?

For shipping the control unit 89170-33E30 there is the parcel, or a UPS collection booked for an extra charge. After the repair, UPS returns it from Airbag24.

Do not forget to put the printed repair order into the parcel, and pack the unit shockproof.