Airbag control unit with part number 89170-04190

What does the airbag control unit 89170-04190 do?

The airbag control unit 89170-04190 is the central control unit of the SRS in vehicles from Toyota. It processes the signals from the crash sensors, decides within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system permanently. It reports faults via the airbag warning light.

After a crash, the unit stores crash data and locks itself. Monitoring continues even during normal operation.

Why does the control unit 89170-04190 fail?

The most common cause of a failure with 89170-04190 is stored crash data, even if no airbag has deployed. A standard diagnostic tool cannot erase it, so Airbag24 erases it during the repair. Other causes are aged components, moisture and corrosion at plug connections, cold solder joints, and voltage spikes.

Aged electronic components lose performance over time, and corrosion at plugs impairs the contact. Faulty solder joints can also make themselves felt.

Voltage spikes arise, for example, with a weak battery or when starting with a jump start, and they load the electronics.

How can you tell that the 89170-04190 is defective?

The airbag warning light in the instrument cluster indicates a fault in the 89170-04190 by lighting up constantly or intermittently. In addition, a fault message appears, the diagnostic tool cannot reach the control unit, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may fail to deploy. Do not ignore the warning; have the vehicle checked promptly.

Which vehicles is the 89170-04190 fitted in?

The 89170-04190 is fitted in these vehicles: Toyota Tacoma N200 (2004-2015).

This list names the vehicles to which the part number is assigned:

• Toyota Tacoma N200 (2004-2015)

Compare the part number on the label of the removed unit with this page so that you have the right unit. Whether the control unit is defective, or whether a plug or cable is the cause, is established only by the fault memory. Have it 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 89170-04190 work?

With 89170-04190, first have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit, create the repair order online and send in the well-packed unit. Processing at Airbag24 takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. The unit is then sent 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 89170-04190 get to Airbag24?

You send the control unit 89170-04190 as a parcel to Airbag24 or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

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