Airbag control unit with part number 89170-06850

What does the airbag control unit 89170-06850 do?

The airbag control unit 89170-06850 is the central control unit of the restraint system for vehicles of the make Lexus. It evaluates the signals from the crash sensors, decides within milliseconds in an accident on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

The unit shows detected faults via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself.

Why does the control unit 89170-06850 fail?

Stored crash data is the most common cause: it remains in the unit after an accident, even if no airbag has deployed. A standard diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, as well as voltage spikes, for example from a weak battery or a jump start, also come into consideration.

The memory keeps the data until it is removed during a repair.

The other causes mainly concern ageing and environmental influences: electronics age, solder joints can go cold, and moisture or corrosion disturb the contact at plugs.

How can you tell that the 89170-06850 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. With these signs, airbags and seatbelt pretensioners may fail to deploy in an emergency.

The warning light is the most obvious sign. Have the fault memory read out promptly.

A diagnostic tool that cannot establish a connection also points to a problem. Only the read-out shows whether the control unit itself is affected or a cable or connector.

Which vehicles is the 89170-06850 fitted in?

This number belongs to vehicles of the make Lexus. The control unit 89170-06850 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The assignment is stored here as a list:

• Lexus ES AXZH60 (from 2018)

Compare the number on the label of the removed unit with this page. This only confirms that you have the right unit. Also have the fault memory read out in advance, because the log 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 89170-06590, 89170-06880.

How does the repair of the 89170-06850 work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Afterwards you create a repair order online and send the well-packed unit in. The processing time at Airbag24 is usually 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. The unit then goes back to you.

The order of steps during removal serves safety and must be observed.

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 89170-06850 get to Airbag24?

You send the control unit 89170-06850 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

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