Airbag control unit with part number 89170-04450

What does the airbag control unit 89170-04450 do?

The 89170-04450 evaluates the signals from the crash sensors in the restraint system (SRS) of Toyota. In an accident it decides within milliseconds on airbags and seatbelt pretensioners and checks the system continuously.

Detected faults are shown via the airbag warning light in the instrument cluster.

An accident means that crash data is stored in the unit and that it locks itself.

Why does the control unit 89170-04450 fail?

Stored crash data is the most common reason for a failure at the 89170-04450, even without an airbag having fired. A normal diagnostic tool cannot erase this data. In addition, aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes come into consideration.

The crash data records what the unit captured during the event. Whether an airbag fired makes no difference to this entry.

The other causes arise over the service life: ageing, moisture and corrosion attack the contacts, and voltage spikes from a weak battery or jump-starting stress the electronics.

How can you tell that the 89170-04450 is defective?

The signs at the 89170-04450 are an airbag warning light that stays on permanently or from time to time, an error message, a missing connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may therefore fail to fire.

The lamp is a visible sign, regardless of how the vehicle behaves in everyday use.

A diagnostic tool without a connection to the control unit is also a reason to have the system checked.

Which vehicles is the 89170-04450 fitted in?

The 89170-04450 is fitted in these vehicles: Toyota Tacoma N200 (2004-2015).

The overview below shows which vehicles belong to this part number.

• Toyota Tacoma N200 (2004-2015)

Use this page to compare the part number on the label of your removed unit. That tells you it is the matching unit, nothing more. Whether the control unit is defective or a plug or cable is the cause is revealed only by the fault memory, which you should have read out before removal.

For the same vehicles, we also repair control units with the part numbers 89170-04420, 89170-04570, 89170-04600, 89170-04650.

How does the repair of the 89170-04450 work?

You first read out the fault memory, attach the log, disconnect the battery and remove the control unit 89170-04450. Then create a repair order online and send in the well-packed unit. Airbag24 checks it on the test bench, replaces defective components, erases the stored crash data and carries out a function test before the unit is returned to you.

At Airbag24, checking, repairing and testing usually take 3–4 working days.

The sequence serves the safety of the restraint system.

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 89170-04450 get to Airbag24?

Shipping and return are handled by UPS: you either send the 89170-04450 as a parcel, or you book a collection for an extra charge. Airbag24 sends the repaired unit back by UPS as well.

Print out the repair order and put it in the parcel. The unit must be packed to withstand shocks.