Airbag control unit with part number 89170-33N11

What does the airbag control unit 89170-33N11 do?

The airbag control unit 89170-33N11 works as the control centre of the restraint system (SRS) for Lexus. From the signals of the crash sensors it calculates which airbags and seatbelt pretensioners fire in a crash, within milliseconds. At the same time, it monitors the system continuously and shows faults via the airbag warning light.

If the vehicle is involved in an accident, the unit then stores crash data and locks itself.

In everyday operation the control unit goes unnoticed as long as the system is in order.

Why does the control unit 89170-33N11 fail?

The most common cause with the 89170-33N11 is crash data from an accident that cannot be erased with a normal diagnostic tool, even if no airbag fired. Further causes are aged components, solder joints, moisture and voltage spikes.

Airbag24 removes the crash data during the repair. The other causes arise from ageing, moisture and the voltage in the vehicle electrical system.

• ageing of electronic components
• cold solder joints
• corrosion at plug connections caused by moisture
• voltage spikes, for example with a weak battery or jump-starting

Testers can only identify the exact cause on the unit itself.

How can you tell that the 89170-33N11 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears in the instrument cluster at the same time. If no connection to the diagnostic tool is established, or the fault memory stays unchanged, this points to a fault on the 89170-33N11.

A fault memory that cannot be cleared also counts among the signs. In an emergency, airbags and seatbelt pretensioners may then not be able to deploy.

If the display shows a problem, have it checked promptly.

Which vehicles is the 89170-33N11 fitted in?

The 89170-33N11 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

Below you will find the list of vehicles for this part number.

• Lexus ES AXZH60 (from 2018)

Comparing the part number on the label of the removed unit with this page is a safeguard that you have the right unit. Whether the control unit itself is defective, or whether a plug or cable is the problem, is shown only by the fault memory read out. Have this read out before removal.

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 89170-33N11 work?

The fault memory is read out first, and you attach the log. After disconnecting the battery comes the removal; then you create the repair order online and send the control unit 89170-33N11 in well packed. Airbag24 needs 3–4 working days in total for inspecting, repairing and testing.

At Airbag24, the faulty components are repaired, the crash data is erased and a function test is carried out. Afterwards your own unit 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 89170-33N11 get to Airbag24?

You send the unit as a parcel, or have it collected by UPS for an extra charge. After the repair, Airbag24 sends your own unit back by UPS. The printed repair order for the 89170-33N11 belongs in the parcel, as does shock-proof packaging.

Make sure the unit sits firmly in the box and nothing shifts.