Airbag control unit with part number 89170-44050

What does the airbag control unit 89170-44050 do?

The airbag control unit 89170-44050 is the control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and shows faults via the airbag warning light.

The system is in operation all the time and is monitored continuously. Detected faults end up in the fault memory, which a diagnostic tool can read out later.

After an accident, the unit stores crash data and locks itself. The repair lifts this lock.

Why does the control unit 89170-44050 fail?

Stored crash data from an accident is the most common cause, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from weak batteries or jump-starting.

The crash data is an entry in the unit that you cannot see from the outside. That is why only the repair removes this entry.

The remaining causes are difficult to narrow down without a check. Airbag24 examines them on the test bench.

How can you tell that the 89170-44050 is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which stays on permanently or only at times. Fault messages can also appear, the diagnostic tool may fail to make contact, and the fault memory may not be clearable.

The warning light is the most important warning sign. If the diagnostic tool cannot reach the control unit, the fault has not been narrowed down, and that is exactly what must be clarified.

As long as the fault exists, airbags and seatbelt pretensioners may fail to deploy in an emergency. An early check provides certainty here.

In which vehicles is the 89170-44050 fitted?

The control unit 89170-44050 is fitted in these vehicles: Toyota Avensis Verso XM20 (2001-2003) and XM20 Facelift (2003-2005).

The vehicles listed for this part number follow:

• Toyota Avensis Verso XM20 (2001-2003)
• Toyota Avensis Verso XM20 Facelift (2003-2005)

Comparing the part number on the label with this page only protects you from sending the wrong unit. Whether the control unit is defective becomes clear only when the fault memory is read out, which you should have done before removal. A plug or cable may also be the cause.

For the same vehicles, we also repair control units with the part numbers 89170-44040, 89170-44060.

How does the repair of the 89170-44050 work?

First have the fault memory read out and enclose the report, then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the well-packed unit in. Airbag24 usually needs 3–4 working days for checking, repairing and testing.

This sequence is prescribed for safety reasons. Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test.

Afterwards, your own unit 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 89170-44050 get to Airbag24?

You send the unit to Airbag24 as a parcel or, for an extra charge, book a UPS collection. After the repair, Airbag24 sends it back by UPS.

Enclose the printed repair order in the parcel and pack the unit shock-proof.