Airbag control unit with part number 89170-04620

What does the airbag control unit 89170-04620 do?

For Toyota, the airbag control unit 89170-04620 is the central control unit of the restraint system (SRS). It evaluates the signals from the crash sensors and determines in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

The control unit monitors the system continuously. If a fault occurs, it appears via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself. A properly working unit is a prerequisite for the airbags to deploy in an emergency.

Why does the control unit 89170-04620 fail?

For 89170-04620, the most common cause is an accident with stored crash data, even if no airbag was triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion, and voltage spikes.

Stored crash data cannot be deleted with a standard diagnostic tool. Airbag24 deletes it during the repair.

Electronic components can age over the years, and solder joints can go cold. Moisture and corrosion attack the contacts at plug connections.

Voltage spikes arise, for example, from a weak battery or when jump-starting, and stress the electronics.

How can you tell that the 89170-04620 is defective?

A fault in the control unit 89170-04620 shows up through the airbag warning light in the instrument cluster, when it lights up permanently or intermittently. In addition an error message appears in the instrument cluster, or the diagnostic tool finds no connection to the control unit.

A fault memory that cannot be cleared is a further sign. In an emergency, airbags and seatbelt pretensioners may not deploy.

Which vehicles is the 89170-04620 fitted in?

The control unit 89170-04620 is intended for Toyota. It is fitted in this vehicle: Toyota Tacoma N200 (2004-2015).

The vehicle information is in this list:

• Toyota Tacoma N200 (2004-2015)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the right unit. Have the fault memory read out beforehand, because only this result 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 89170-04420, 89170-04570, 89170-04600, 89170-04650.

How does the repair of the 89170-04620 work?

First have the fault memory of the 89170-04620 read out and attach the log. Then disconnect the battery and only then remove the control unit. For checking, repairing and testing at Airbag24, plan on 3–4 working days as a rule.

Afterwards create a repair order online and pack the unit well for sending. Airbag24 checks it on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Then your own unit is sent back.

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 89170-04620 get to Airbag24?

You send the control unit 89170-04620 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns it by UPS.

You put the printed repair order into the parcel and pack the unit shock-proof.