Airbag control unit with part number 89170-33N20

What does the airbag control unit 89170-33N20 do?

The airbag control unit 89170-33N20 coordinates the restraint system (SRS) in Lexus. It evaluates crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself.

The unit monitors the system continuously and reports detected faults via the airbag warning light in the instrument cluster.

This monitoring is only meaningful as long as sensors and connections work flawlessly.

Why does the control unit 89170-33N20 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered. A normal diagnostic tool cannot erase this data; other causes include aging components, solder joints, moisture and voltage spikes.

An accident without a triggered airbag can still leave crash data behind, which remains in the unit.

The other causes develop gradually and cannot be reliably judged from the outside.

How can you tell that the 89170-33N20 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears. If the diagnostic tool cannot reach the control unit or the fault memory cannot be erased, a defect is likely.

You can recognise it by these typical signs:

• airbag warning light on permanently or intermittently
• fault message in the instrument cluster
• no connection to the control unit via the diagnostic tool
• fault memory cannot be erased

In a defect, airbags and seatbelt pretensioners may not trigger in an emergency.

Which vehicles is the 89170-33N20 fitted in?

The airbag control unit 89170-33N20 is fitted in these vehicles: Lexus ES AXZH60 (from 2018). The list is for orientation; the part number on the unit remains the decisive factor.

The vehicle type alone is not enough for the assignment.

The vehicles at a glance:

• Lexus ES AXZH60 (from 2018)

On the one hand, you compare the part number on the label of the removed unit with this page; this only ensures that it is the correct unit. On the other hand, you have the fault memory read out beforehand, because only this shows whether the control unit is defective or a connector 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 89170-33N20 work?

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

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Afterwards, your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days. This period applies only to checking, repairing and testing at Airbag24.

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 89170-33N20 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back via UPS.

Put the printed repair order into the parcel and pack the unit shockproof.