Airbag control unit with part number 89170-33R80

What does the airbag control unit 89170-33R80 do?

The airbag control unit 89170-33R80 is the central control unit of the restraint system (SRS) of Lexus. It evaluates the signals from the crash sensors, decides within milliseconds in the event of an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It indicates faults via the airbag warning light.

During operation, the control unit checks sensors, cables and triggering elements for plausibility. This check runs without interruption.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 89170-33R80 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot delete it. Further causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, as well as voltage spikes.

Crash data is therefore among the most common reasons for a failure. Airbag24 deletes it during the repair, and the rest of the unit is then checked.

The other causes concern the electronics and their connections. Components age, solder joints can be cold, and moisture and corrosion attack plug contacts. Voltage spikes arise, for example, from a weak battery or when jump-starting.

How can you tell that the 89170-33R80 is defective?

The airbag warning light in the instrument cluster is on permanently or intermittently. In addition, a fault message appears, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

The warning light shows the fault directly, so it does not go unnoticed in everyday use. Pay attention to every time it lights up.

As long as the fault exists, airbags and seatbelt pretensioners may possibly not trigger in an emergency. Therefore have the fault memory read out promptly.

Which vehicles is the 89170-33R80 fitted in?

The control unit 89170-33R80 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The vehicles on record are shown in the following overview:

• Lexus ES AXZH60 (from 2018)

Two steps are worthwhile before sending the unit in. Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. The fault memory read out, on the other hand, shows whether the control unit itself 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 89170-33R80 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Afterwards, create a repair order online and send in the well-packed unit. Airbag24 generally needs 3–4 working days to process the unit.

At Airbag24, the unit is examined on the test bench. Defective components are replaced, stored crash data is deleted afterwards, and a function test is carried out. The unit then returns 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 89170-33R80 get to Airbag24?

You send the control unit 89170-33R80 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS. Put the printed repair order into the parcel and pack the unit shockproof.

Padding material in the box prevents the unit from slipping or hitting the wall during transit.