Airbag control unit with part number 89170-0W33E

What does the airbag control unit 89170-0W33E do?

The airbag control unit 89170-0W33E is the central control unit of the restraint system (SRS) for Toyota. It evaluates the crash sensors, decides in an accident within milliseconds on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

If the unit detects a fault, it appears via the airbag warning light in the instrument cluster. This display is the most important signal of the system.

After an accident the control unit stores crash data and locks itself. The lock is lifted only by a repair.

Why does the control unit 89170-0W33E fail?

Stored crash data is the most common cause on the 89170-0W33E, even when no airbag has triggered. Further causes are aged electronic components, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

The crash data remains in the memory until it is removed during a repair. A normal diagnostic tool does not reach it in the process.

The following causes come into consideration in addition:

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

How can you tell that the 89170-0W33E is defective?

A defect on the 89170-0W33E shows itself through the airbag warning light, which lights up permanently or intermittently, through a fault message in the instrument cluster, through a missing connection to the diagnostic tool, and through a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

That the warning light is on means that the restraint system has detected a fault. The display therefore makes the fault directly visible.

Whether a cable or a plug is behind it cannot be read from the display alone. The fault memory is responsible for that.

Which vehicles is the 89170-0W33E fitted in?

The 89170-0W33E is fitted in these vehicles: Toyota Auris E150 (2006-2010) and E150 Facelift (2010-2012).

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

• Toyota Auris E150 (2006-2010)
• Toyota Auris E150 Facelift (2010-2012)

Compare the part number on the label of the removed unit with this page. This only establishes that it is the right unit. Also have the fault memory read out before you remove the control unit, because only this result shows whether it is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 215537-106, 89170-02560, 89170-0W330, 8924502040.

How does the repair of the 89170-0W33E work?

Processing at Airbag24 takes 3–4 working days as a rule, during which the 89170-0W33E is tested, repaired and checked. Before that, you have the fault memory read out, disconnect the battery, remove the unit and create the repair order online, before you send it in well packed.

The order protects during the work on the vehicle, because the restraint system must not be triggered unintentionally.

Airbag24 examines the unit on the test bench, replaces defective components or repairs them, erases the stored crash data and carries out a function test.

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 89170-0W33E get to Airbag24?

You send the 89170-0W33E as a parcel or book a UPS collection for an extra charge. Returns after the repair are made by UPS.

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