Airbag control unit with part number 89170-33N41

What does the airbag control unit 89170-33N41 do?

The airbag control unit 89170-33N41 is the central unit of the restraint system (SRS) in Lexus. It processes the data from the crash sensors, selects in a crash the airbags and seatbelt pretensioners that fire, and monitors the system continuously.

It reports 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 89170-33N41 fail?

Stored crash data is the most common cause, even if no airbag has fired; an ordinary diagnostic tool cannot erase it. Further causes are aged electronics, cold solder joints, moisture at plug connections and voltage spikes, for example from a weak battery.

As long as the crash data is in memory, the fault can occur long after the accident.

Aged components and cold solder joints work unreliably, and moisture attacks contacts. A jump start or a weak battery puts additional strain on the electronics.

How can you tell that the 89170-33N41 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. Accompanying it, an error message appears in the instrument cluster, and the diagnostic tool does not find the control unit.

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

The light reports the defect as soon as the unit detects it. Have the display examined promptly.

Which vehicles is the 89170-33N41 fitted in?

The 89170-33N41 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The list of vehicles follows directly below.

• Lexus ES AXZH60 (from 2018)

Before sending, compare the part number on the label with this page. That only confirms whether it is the correct unit. Having the fault memory read out, on the other hand, shows whether the unit or a plug or 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 89170-33N41 work?

Have the fault memory read out and enclose the log before doing anything else. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit off well packed. Airbag24 usually needs 3–4 working days for checking, repair and testing.

For safety reasons, keep to this sequence without fail.

Airbag24 checks the unit on the test bench before defective components are replaced. Stored crash data is erased during this repair, and a function test concludes the process before the return.

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 89170-33N41 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 also sends the repaired unit back by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.