Airbag control unit with part number 89170-33S10

What does the airbag control unit 89170-33S10 do?

The airbag control unit 89170-33S10 coordinates the airbags and seatbelt pretensioners in the vehicle of Lexus. It records the values of the crash sensors, decides within milliseconds in an accident on triggering, and checks the system continuously. After an accident it stores crash data and locks itself.

Detected faults are shown by the unit via the airbag warning light in the instrument cluster. Monitoring runs while driving and with the ignition switched on.

Why does the control unit 89170-33S10 fail?

The most common cause is a stored state after an accident that contains crash data, even if no airbag has deployed. Added to this are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 erases it during the repair.

The other causes at a glance:

• Aged electronic components
• Cold solder joints on the circuit board
• Moisture and corrosion on plug connections
• Voltage spikes, for example with a weak battery or jump-starting

How can you tell that the 89170-33S10 is defective?

If the airbag warning light lights up permanently or intermittently, the system has detected a fault. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

Typical signs:

• The airbag warning light in the instrument cluster stays on or flickers.
• A fault message appears in the instrument cluster.
• A diagnostic tool cannot reach the control unit.
• The fault memory cannot be cleared.

Which vehicles is the 89170-33S10 fitted in?

The 89170-33S10 is fitted at Lexus in these vehicles: Lexus ES AXZH60 (from 2018). Use this list to check whether your vehicle is among them before you remove anything.

The affected model in detail:

• Lexus ES AXZH60 (from 2018)

A part number is printed on the label of the removed unit. Compare it with this page, and then you know that it is the correct unit. Before you remove it, have the fault memory read out; 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 89170-33S10 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Next, create the repair order online and send the carefully packed unit. Testing, repairing and function testing at Airbag24 usually take 3–4 working days.

Airbag24 examines the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test.

The repaired unit then 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 89170-33S10 get to Airbag24?

You send the unit as a parcel, or book a UPS collection for an extra charge. Airbag24 returns the repaired unit to you by UPS.

The printed repair order goes into the parcel, and you pack the control unit shockproof.