Airbag control unit with part number 89170-06B41

What does the airbag control unit 89170-06B41 do?

As an SRS control unit, the airbag control unit 89170-06B41 controls the restraint system for Lexus. It evaluates the signals from the crash sensors, decides in an emergency on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The unit reports faults via the airbag warning light in the instrument cluster. Monitoring runs in the background for as long as the vehicle is switched on.

The crash data show the course of the accident from the control unit's point of view.

Why does the control unit 89170-06B41 fail?

Stored crash data from an accident are the most common cause, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A normal diagnostic tool cannot erase these records. Even a minor accident without a deployed airbag can leave crash data behind.

The other causes relate mainly to age, moisture and the power supply. Electronics age, solder joints can stay cold, and moisture corrodes plug connectors. Voltage spikes, for example from a weak battery or a jump start, additionally stress the components.

How can you tell that the 89170-06B41 is defective?

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

As long as these signs persist, airbags and seatbelt pretensioners may not deploy in an emergency. A prompt check is therefore the right step.

Which vehicles is the 89170-06B41 fitted in?

The 89170-06B41 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The models for which this number is on record are shown in the following overview:

• Lexus ES AXZH60 (from 2018)

Comparing the number on the label of the removed unit with this page confirms that it is the right unit. Having the fault memory read out beforehand shows whether the control unit itself is affected or a plug or a cable is causing the fault.

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 89170-06B41 work?

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

Keep to this sequence, because it is essential for safety.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. The 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 89170-06B41 get to Airbag24?

You send the control unit 89170-06B41 as a parcel or book a UPS collection for an extra charge. Airbag24 returns the unit to you by UPS after the repair.

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