Airbag control unit with part number 89170-0C272

What does the airbag control unit 89170-0C272 do?

The airbag control unit 89170-0C272 is the central control unit of the SRS system for Toyota. It checks the signals from the crash sensors, decides in a crash within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. Faults appear on the airbag warning light; after an accident it stores crash data and locks itself.

In everyday use the unit works without any action by the driver. Its significance only becomes apparent in an emergency, and then it has to work reliably.

Anyone who has such a unit checked is checking the function of the entire restraint system.

Why does the control unit 89170-0C272 fail?

The most common cause with the 89170-0C272 is crash data from an accident, even if no airbag was triggered; a normal diagnostic tool cannot clear it. In addition there are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, as well as voltage spikes.

Further triggers at a glance:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or jump-starting

The crash data belongs to an accident, while the other points concern the electronics in everyday operation.

Both can act together, which is why the cause cannot be read from the symptom alone.

How can you tell that the 89170-0C272 is defective?

A defect in the 89170-0C272 shows through an airbag warning light in the instrument cluster that stays on permanently or intermittently, through a fault message in the instrument cluster, through a diagnostic tool with no connection to the control unit, or through a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not trigger.

The airbag warning light in the instrument cluster is the sign you are most likely to see. If it stays on after switching on the ignition, or comes back while driving, an inspection is due.

A fault message or a diagnostic tool without connection indicates a problem, but it does not have to lie in the control unit. Connectors and wiring are also possible causes.

Which vehicles is the 89170-0C272 fitted in?

The control unit 89170-0C272 is fitted in these vehicles: Toyota Tundra K30 (2007-2021).

These vehicles are listed below:

• Toyota Tundra K30 (2007-2021)

Comparing the part number on the label with this page only ensures that the unit is the correct one. Having the fault memory read out beforehand, on the other hand, 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 89170-0C440, 89170-0C450, 89170-0C451, 89170-0C452, 89170-0C490, 89170-0C581.

How does the repair of the 89170-0C272 work?

For the repair of the 89170-0C272, first have the fault memory read out and attach the log; then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 takes 3–4 working days as a rule.

At Airbag24 the test bench checks the unit, defective components are repaired, stored crash data is deleted and a function test is carried out.

Your own unit then goes 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 89170-0C272 get to Airbag24?

Either you send the control unit 89170-0C272 as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends the repaired unit back to you by UPS once the work is complete.

Pack the unit shock-proof and enclose the printed repair order.