Airbag control unit with part number 89170-02500

What does the airbag control unit 89170-02500 do?

In Toyota vehicles, the control unit 89170-02500 controls the restraint system (SRS). It evaluates the signals from the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and checks the system continuously. It reports faults via the airbag warning light.

The unit is in constant operation and checks the connected components as soon as the vehicle is powered.

After an accident, it stores crash data and then locks itself.

Why does the control unit 89170-02500 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes are aged components, moisture, corrosion and voltage spikes.

Airbag24 erases the crash data during the repair of the control unit 89170-02500. The other causes affect the electronics and the plug connections.

Apart from the crash data, these triggers are possible:

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

How can you tell that the 89170-02500 is defective?

The airbag warning light in the instrument cluster indicates faults by lighting up permanently or intermittently. Fault messages may also appear in the instrument cluster, the diagnostic tool does not connect to the control unit, and the fault memory cannot be cleared.

If the warning light comes on, have the system checked promptly. In an emergency, airbags and seatbelt pretensioners may not be triggered, which is exactly why the check matters.

Which vehicles is the 89170-02500 fitted in?

The control unit 89170-02500 from Toyota is fitted in these vehicles: Toyota Auris E150 (2006-2010) and E150 Facelift (2010-2012).

The vehicles listed for this part number are shown here:

• 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 to confirm that you have the right unit. Have the fault memory read out beforehand, because only it shows whether the control unit is defective or whether plugs and cables are 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 89170-02500 work?

It starts with reading out the fault memory, and you enclose the log with the unit. Then disconnect the battery and remove the control unit 89170-02500. Finally, create a repair order online and pack the unit carefully for dispatch.

At Airbag24, the unit is checked, defective components are replaced, the crash data is erased, and a function test is carried out. Your own unit is then returned to you.

Processing usually takes 3–4 working days. This time refers to checking, repairing and testing at Airbag24.

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 89170-02500 get to Airbag24?

You send the control unit 89170-02500 to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, the unit is returned to you by UPS.

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