Airbag control unit with part number 89170-33491

What does the airbag control unit 89170-33491 do?

The airbag control unit 89170-33491 is the central control unit for the restraint system (SRS) on Toyota. It evaluates the crash sensors and decides in a fraction of a second which airbags and seatbelt pretensioners to trigger. At the same time it monitors the system and indicates faults via the airbag warning light.

After an accident the unit stores crash data and locks itself. While driving it continues working in the background.

Why does the control unit 89170-33491 fail?

Most often the cause lies in crash data that remains stored after an accident, even without an airbag deployment. This data cannot be erased with a normal diagnostic tool. Other causes include aged electronic components, cold solder joints, moisture and corrosion, and voltage spikes.

Crash data is the most common cause, because it stays in the unit and does not simply disappear after the accident. An ordinary diagnostic tool cannot reach it.

The other causes lie in the electronics themselves or in their surroundings. Components age, solder joints can turn cold, and moisture and corrosion attack plug connectors.

Voltage spikes, for example from a weak battery or when starting with a jump-start, can also stress the control unit.

How can you tell that the 89170-33491 is defective?

The airbag warning light in the instrument cluster lights continuously or intermittently, and a fault message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to deploy in an emergency.

The light shows the fault itself, so the display should be taken seriously.

Which vehicles is the 89170-33491 fitted in?

Whether your car is affected you check by comparing the details. The 89170-33491 control unit of Toyota is fitted in these vehicles: Toyota Camry XV40 (2006-2011).

The vehicles in detail:

• Toyota Camry XV40 (2006-2011)

On the one hand, compare the part number on the label of the removed unit with this page, so that you can be sure you have the correct unit. On the other hand, have the fault memory read out beforehand, because only that shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-06A40.

How does the repair of the 89170-33491 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit. Afterwards create the repair order online and send the unit in.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Then your unit is returned.

Processing at Airbag24 usually takes 3–4 working days, and this time covers only checking, repair and testing. 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 89170-33491 get to Airbag24?

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

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