Airbag control unit with part number 89170-33E10

What does the airbag control unit 89170-33E10 do?

As an SRS control unit, the 89170-33E10 manages the restraint system in Lexus vehicles. In a crash it evaluates the signals from the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered.

The unit monitors the system without interruption, even during everyday use. If it finds a fault, it indicates this via the airbag warning light in the instrument cluster.

If an accident has occurred, it stores crash data and then locks itself.

Why does the control unit 89170-33E10 fail?

Stored crash data is the most common cause, even if no airbag was triggered. Aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start, are also possible causes.

This data remains in the unit during normal reading out, because a standard diagnostic tool cannot erase it. It disappears only with the repair.

The other causes cannot be recognised from the outside. Whether one of them is present is shown only by the test on the test bench.

How can you tell that the 89170-33E10 is defective?

A defect in the 89170-33E10 is indicated above all by the airbag warning light in the instrument cluster, once it lights up constantly or intermittently. In addition, there are error messages in the display, a diagnostic tool without connection, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may therefore fail to deploy. This also applies if the light comes on only intermittently.

The warning light shows the finding, so it is worth acting promptly.

Which vehicles is the 89170-33E10 fitted in?

The 89170-33E10 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The vehicles are shown in the overview below.

• Lexus ES AXZH60 (from 2018)

Comparing the part number on the label of the removed unit with this page confirms that it is the right unit. Also have the fault memory read out before sending the unit in, because 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 89170-33E10 work?

The repair of the 89170-33E10 begins with the fault memory being read out and the log enclosed. Then disconnect the battery and only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

The order is mandatory, as safety comes first. Only once the unit is removed do you create a repair order online and pack the control unit securely for shipping.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then returned 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 89170-33E10 get to Airbag24?

You send the control unit 89170-33E10 as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Put the printed repair order into the parcel and pack the unit shock-proof.