Airbag control unit with part number 89170-0C090

What does the airbag control unit 89170-0C090 do?

Within the restraint system (SRS) of Toyota, the airbag control unit 89170-0C090 is the central unit. It evaluates the crash sensors, decides within milliseconds in the event of an accident about airbags and seatbelt pretensioners, and monitors the system continuously. It indicates faults via the airbag warning light.

When the vehicle is driven, the unit works along; after an accident, it stores crash data and locks itself.

For its task it needs stable voltage and intact connections to the sensors and triggers.

Why does the control unit 89170-0C090 fail?

Stored crash data is the first thing to look at when the 89170-0C090 fails, and this also applies without a triggered airbag. Aged components, cold solder joints, moisture with corrosion at plug connections and voltage spikes from the vehicle electrical system come on top of this.

A normal diagnostic tool cannot delete crash data, so such an attempt does not get you anywhere.

The other causes concern the electronics and their surroundings. Ageing, cold solder joints, moisture and voltage spikes belong to them, for example with a weak battery or during a jump start.

How can you tell that the 89170-0C090 is defective?

You can recognise a defect in the 89170-0C090 by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition, an error message in the instrument cluster, no connection to the diagnostic tool and a fault memory that cannot be cleared may appear. In that case, airbags and seatbelt pretensioners may not trigger in an emergency.

The following signs occur:

• airbag warning light, on permanently or intermittently
• message in the instrument cluster
• no connection of the diagnostic tool
• fault memory that cannot be removed

Which vehicles is the 89170-0C090 fitted in?

The 89170-0C090 is designed for Toyota. It is fitted in these vehicles: Toyota Tundra K30 (2007-2021).

These vehicles are recorded in our data:

• Toyota Tundra K30 (2007-2021)

Comparing the part number on the label of the removed unit with this page only shows that it is the correct unit. Whether the control unit is defective or only a plug or cable is affected is shown only by reading out the fault memory, which you carry out before removal.

For the same vehicles, we also repair control units with the part numbers 89170-0C440, 89170-0C450, 89170-0C451, 89170-0C452, 89170-0C490, 89170-0C581.

How does the repair of the 89170-0C090 work?

Have the fault memory read out first and attach the log; then disconnect the battery and remove the control unit 89170-0C090. Afterwards create a repair order online and send the unit off well packed. Airbag24 checks it on the test bench, repairs defective components, deletes stored crash data and carries out a function test, after which your unit is returned. Processing at Airbag24 usually takes 3–4 working days.

The sequence is fixed for your safety, so it does not vary.

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 89170-0C090 get to Airbag24?

You send the control unit 89170-0C090 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 in the parcel and pad the unit shock-proof.