Airbag control unit with part number 89170-33P01

What does the airbag control unit 89170-33P01 do?

The airbag control unit 89170-33P01 coordinates the restraint system (SRS) of Lexus. The crash sensors send it their measured values, and in an accident it decides within milliseconds which airbags and seatbelt pretensioners are triggered. It shows faults in the system via the airbag warning light.

Even outside an accident, the unit continuously checks whether sensors, cables and output stages are working. The restraint system is therefore monitored permanently, without any intervention from you.

After an accident, the unit stores crash data and locks itself. The lock is lifted during the repair.

Why does the control unit 89170-33P01 fail?

The most common cause for the 89170-33P01 is crash data stored after an accident, even without a triggered airbag. Further causes are aged electronics, cold solder joints, moisture and voltage spikes.

A normal diagnostic tool cannot erase this crash data, so the fault remains.

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump-start

How can you tell that the 89170-33P01 is defective?

On the 89170-33P01, you can recognise a defect by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition there is an error message in the instrument cluster, and a diagnostic tool that cannot connect to the control unit.

Another sign is a fault memory that cannot be cleared. As long as the control unit is defective, airbags and seatbelt pretensioners may not trigger reliably in an emergency, and that is exactly what the warning light indicates. Do not ignore it.

Which vehicles is the 89170-33P01 fitted in?

The 89170-33P01 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

The overview that follows shows which vehicles belong to it.

• Lexus ES AXZH60 (from 2018)

First check the number on the label of the removed unit against 89170-33P01 on this page. This only establishes that it is the right unit. Then have the fault memory read, because this log shows whether the control unit or a connector 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 89170-33P01 work?

You first read out the fault memory and enclose the log. Then you disconnect the battery and only afterwards remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Afterwards, you create a repair order online and pack the unit well before sending it in. Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. 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 89170-33P01 get to Airbag24?

You send the control unit 89170-33P01 either as a parcel or with a UPS collection booked for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.