Airbag control unit with part number 89170-76610

What does the airbag control unit 89170-76610 do?

The airbag control unit 89170-76610 is responsible for the restraint system (SRS) in Lexus. It receives readings from the crash sensors and calculates in an accident which airbags and seatbelt pretensioners are triggered; only milliseconds are available for this. It reports faults via the airbag warning light.

The unit also monitors the system during operation and detects deviations in the connected components.

After an accident, it stores crash data and locks itself.

Why does the control unit 89170-76610 fail?

The most common cause is crash data from an earlier accident, even without a triggered airbag; a normal diagnostic tool does not erase it. Further causes are ageing electronic components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

Crash data is stored event data. Airbag24 erases it during the repair, so this point is taken care of for the unit.

The other causes act in different ways. A component can age, a solder joint can go cold, and moisture on contacts can cause corrosion. Voltage spikes, for example from jump starts or a weak battery, put additional strain on the electronics.

How can you tell that the 89170-76610 is defective?

Typical signs are the airbag warning light in the instrument cluster, a fault message there, and problems establishing a connection to the diagnostic tool. A fault memory that cannot be cleared also belongs to these signs.

• Airbag warning light in the instrument cluster, permanently or intermittently
• Fault message in the instrument cluster
• No connection between the diagnostic tool and the control unit
• Fault memory that cannot be cleared

If you notice any of these signs, airbags and seatbelt pretensioners may fail to deploy in an emergency.

Which vehicles is the 89170-76610 fitted in?

The airbag control unit 89170-76610 is fitted in these vehicles: Lexus UX MZAA10 (from 2018).

The following list shows the vehicles recorded for this part number with us.

• Lexus UX MZAA10 (from 2018)

Comparing the part number on the label of the removed unit with this page only shows whether you have the correct unit. Whether the control unit itself is defective only becomes clear from the fault memory, which you should have read out beforehand.

How does the repair of the 89170-76610 work?

Airbag24 typically needs 3–4 working days to process the unit. Before the unit is sent in, you do the following: have the fault memory read out, attach the log, disconnect the battery and only then remove the control unit. Create the repair order online.

Pack the unit and send it in. Airbag24 tests it, replaces defective components, deletes stored crash data and runs a function test. Afterwards your own unit comes 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 89170-76610 get to Airbag24?

You either send the unit yourself as a parcel, or book a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

Include the printed repair order in the parcel and pack the unit shockproof.