Airbag control unit with part number 89170-33D00

What does the airbag control unit 89170-33D00 do?

The control unit 89170-33D00 is the control unit of the airbag restraint system (SRS) for Lexus. It processes signals from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds.

At the same time it checks the entire system constantly and reports faults via the airbag warning light.

After an accident the device stores crash data, after which it locks itself.

Why does the control unit 89170-33D00 fail?

Stored crash data after an accident is the most common cause of control unit 89170-33D00, even if no airbag has deployed. Aged electronic components, cold solder joints, moisture and corrosion at connectors, and voltage spikes are also possible.

A normal diagnostic tool cannot delete this crash data.

An examination of the unit shows which cause applies in the individual case.

How can you tell that the 89170-33D00 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. Added to this are a fault message in the instrument cluster, the absence of a connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not deploy.

The airbag warning light is the sign that catches the eye fastest, and it indicates faults in the restraint system.

A diagnostic tool that cannot establish a connection points to a fault in the control unit itself or in its wiring.

Which vehicles is the 89170-33D00 fitted in?

The assignment concerns the make Lexus, and the 89170-33D00 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The vehicles are shown as a list below.

• Lexus ES AXZH60 (from 2018)

Compare the label on the removed unit with this page; that only confirms it is the right unit. Have the fault memory read out beforehand, because the log 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 89170-33D00 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed.

Once the unit has arrived at Airbag24, it is checked on the test bench, defective components are replaced, stored crash data is deleted and a function test is run. Afterwards the own unit goes back to you.

Processing at Airbag24 usually takes 3–4 working days. 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 89170-33D00 get to Airbag24?

Shipment as a parcel is possible; alternatively UPS collects the control unit 89170-33D00 for an extra charge. Airbag24 returns the repaired unit to you by UPS.

The printed repair order is enclosed in the parcel, and the unit is packed shock-proof.