Airbag control unit with part number 89170-33C80

What does the airbag control unit 89170-33C80 do?

The airbag control unit 89170-33C80 evaluates the signals from the crash sensors in Lexus vehicles. In a collision it decides within milliseconds which airbags and seatbelt pretensioners fire. After an accident it stores crash data and locks itself.

It also monitors the entire deployment chain continuously. Faults it detects are reported via the airbag warning light in the instrument cluster.

Why does the control unit 89170-33C80 fail?

Stored crash data comes first among the causes, even if no airbag deployed in the accident. Aged electronic components, cold solder joints, moisture and corrosion, and voltage spikes are further causes.

A normal diagnostic tool cannot delete crash data. The repair at Airbag24 therefore also includes deleting this data.

The other causes concern the electronics and their connections. Ageing components, poorly soldered spots and moisture at plug connections belong here. Voltage spikes, for example from a weak battery or a jump start, can also stress the unit.

How can you tell that the 89170-33C80 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and the instrument cluster may also show an error message. If the diagnostic tool gets no connection to the control unit, or the fault memory cannot be cleared, that is another sign. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

After switching on the ignition, the system runs a brief check. Afterwards the light goes out, provided there is no fault. If it stays on, the finding is clear enough to have it checked.

If in doubt, reading out the fault memory helps, because it shows the fault in the control unit itself.

Which vehicles is the 89170-33C80 fitted in?

The 89170-33C80 is fitted in these Lexus vehicles: Lexus ES AXZH60 (from 2018). Before removal, check your vehicle against this information.

Here is the affected vehicle:

• Lexus ES AXZH60 (from 2018)

You compare the part number with this page on the label of the removed unit; this only tells you that it is the correct unit. Read out the fault memory beforehand. Then it shows whether the control unit is defective or whether a plug or a 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 89170-33C80 work?

First have the fault memory read out, attach the log and disconnect the battery. Only then remove the control unit, create the repair order online and send the unit in, well packed. At Airbag24, checking, repair and function test usually take 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, deletes crash data and carries out a function test.

Afterwards your own unit goes back 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 89170-33C80 get to Airbag24?

You either send the unit by parcel or arrange a UPS collection for an extra charge. After the repair, return shipping follows by UPS.

Print the repair order and put it in the parcel. Pack the control unit shock-proof.