Airbag control unit with part number 89170-0C361

What does the airbag control unit 89170-0C361 do?

For Toyota, the airbag control unit 89170-0C361 takes over control of the restraint system (SRS). It evaluates the crash sensors, determines in milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident, it stores crash data and locks itself.

The control unit detects faults in the system itself and shows them via the airbag warning light in the instrument cluster.

The function of the unit is central to safety in the vehicle, because all triggering runs through this control unit.

Why does the control unit 89170-0C361 fail?

Most often the cause lies in crash data from an earlier accident, even if no airbag fired in it. Aged components, cold solder joints, moisture and corrosion on plugs, and voltage spikes are also possible.

A normal diagnostic tool cannot remove these records. The other triggers lie in the electronics and the contacts.

Components change with age, solder joints can be cold, and moisture causes corrosion on the plugs. Voltage spikes, for example with a weak battery or when starting with an external power source, add further strain to the circuit.

How can you tell that the 89170-0C361 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool cannot establish a connection to the 89170-0C361, or the fault memory cannot be cleared.

If the warning light is on, the system itself has detected and displayed a fault. A defect therefore does not stay hidden.

In an emergency, airbags and seatbelt pretensioners may fail to trigger. A prompt check is therefore sensible.

Which vehicles is the 89170-0C361 fitted in?

Only the read-out fault memory answers the question of the cause. The airbag control unit 89170-0C361 is fitted in these vehicles: Toyota Tundra K30 (2007-2021).

The matching vehicle list is here:

• Toyota Tundra K30 (2007-2021)

First, compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Then have the fault memory read out, because this log shows whether the control unit is defective or a plug or a 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 89170-0C361 work?

At the start, have the fault memory read out with the log attached. Only after disconnecting the battery do you remove the control unit 89170-0C361. Then create a repair order online and send in the securely packed unit.

Airbag24 then examines the unit on the test bench, deletes the crash data, repairs defective components and runs a function test. Your own unit is returned to you afterwards.

Processing at Airbag24 usually takes 3–4 working days. The order at the start serves safety.

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 89170-0C361 get to Airbag24?

Either you send the control unit 89170-0C361 to Airbag24 as a package, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The printed repair order belongs in the package, and the unit must be packed securely.