Airbag control unit with part number 89170-33P30

What does the airbag control unit 89170-33P30 do?

The 89170-33P30 controls the restraint system (SRS) in Lexus vehicles. It evaluates the signals from the crash sensors, decides within fractions of a second in an accident which airbags and seatbelt pretensioners are triggered, and monitors the entire system.

It reports faults via the airbag warning light. After an accident it stores crash data and then locks itself.

Monitoring runs continuously in the background.

Why does the control unit 89170-33P30 fail?

In the 89170-33P30, stored crash data is the most common cause of failure, even when no airbag has deployed; a normal diagnostic tool cannot erase it. Aged components, moisture at the connectors and other electrical stresses also play a role.

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

Airbag24 erases crash data during the repair. You do not need to do anything beforehand.

How can you tell that the 89170-33P30 is defective?

A defect in the 89170-33P30 becomes visible through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Other signs are an error message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

If the control unit fails, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light is therefore a safety notice you should take seriously.

Only the read-out shows whether the control unit is actually affected. A plug or a cable can also be behind it.

Which vehicles is the 89170-33P30 fitted in?

The control unit 89170-33P30 is fitted in these vehicles: Lexus ES AXZH60 (from 2018).

These models are assigned to the part number:

• Lexus ES AXZH60 (from 2018)

First check whether the part number on the label of the removed unit matches this page; that is how you confirm it is the right unit. The fault memory should be read out beforehand, because only this result shows whether the control unit is defective or a 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 89170-33P30 work?

For the 89170-33P30, have the fault memory read out, enclose the log, and then disconnect the battery before removing the control unit. Then create a repair order online and send in the well-packed unit. At Airbag24, processing usually takes 3–4 working days, during which the unit is inspected, repaired and tested.

The sequence is mandatory: disconnect the battery first, then remove the control unit.

Airbag24 replaces defective components, erases the crash data and carries out a function test. Your own device is then returned 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 89170-33P30 get to Airbag24?

You send the control unit 89170-33P30 as a parcel; alternatively, you can book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.