Airbag control unit with part number 89170-0F050

What does the airbag control unit 89170-0F050 do?

The airbag control unit 89170-0F050 is the central control unit of the SRS restraint system in Toyota vehicles. It processes the readings from the impact sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds in a crash, and monitors the entire system.

If the system reports a fault, the airbag warning light comes on. After an accident the unit stores crash data and locks itself; this lock is only cleared by the repair.

Why does the control unit 89170-0F050 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, because a standard diagnostic tool does not erase it. Ageing components, moisture and corrosion, as well as voltage spikes, for example from a weak battery, add to this.

How strongly the individual causes interact cannot be said without reading the unit. The fault memory therefore helps more than any assumption.

The causes also include cold solder joints inside the unit, which cannot be seen from outside.

How can you tell that the 89170-0F050 is defective?

A defect in the 89170-0F050 shows up on the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

In this case, airbags and seatbelt pretensioners may not be able to deploy while the fault persists. Follow up on such signs promptly.

Which vehicles is the 89170-0F050 fitted in?

The 89170-0F050 is fitted in these vehicles: Toyota Verso AR10 (2004-2007) and AR10 Facelift (2007-2009).

The list shows the vehicle entries recorded for this part number:

• Toyota Verso AR10 (2004-2007)
• Toyota Verso AR10 Facelift (2007-2009)

First compare the part number on the label of the removed unit with this page. This only ensures that it is the correct unit. Also have the fault memory read out, because only it shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-0F022, 89170-0F070, 89170-0F080.

How does the repair of the 89170-0F050 work?

Airbag24 needs 3–4 working days in the normal course for testing, repair and function test of the 89170-0F050. The team then erases the stored crash data.

You read out the fault memory first and enclose the log. Only then do you disconnect the battery and remove the control unit. Next, create a repair order online and send the well-packed unit.

Airbag24 tests the unit, repairs defective components and carries out a function test before it is returned. 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 89170-0F050 get to Airbag24?

You send the 89170-0F050 as a parcel to Airbag24 or book a UPS collection for an extra charge. Airbag24 returns the repaired unit by UPS.

Pack the printed repair order with the parcel and pack the control unit shockproof.