Airbag control unit with part number 89170-0C200

What does the airbag control unit 89170-0C200 do?

The airbag control unit 89170-0C200 controls the restraint system (SRS) in Toyota. It processes the signals from the crash sensors, selects the airbags and seatbelt pretensioners to be triggered in an emergency, and monitors the system continuously. After an accident, it stores crash data and locks itself.

You can think of it as the hub of the system, mediating between the sensors and the firing circuits. Its task is clear-cut: it must not delay anything, because every deployment happens in an instant.

Why does the control unit 89170-0C200 fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes include aged electronic components, cold solder joints, moisture and corrosion in plug connections, and voltage spikes.

The stored data comes from the accident itself and remains in the unit, even if the car looks normal from the outside again.

The other causes are linked to ageing and environmental influences. Electronics age, solder joints can become brittle with temperature changes, and plug connections are sensitive to wet conditions.

Voltage spikes, for example from a weak battery or from jump-starting, can also damage the unit. Which cause applies only becomes clear from the examination of the individual case.

How can you tell that the 89170-0C200 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, or the diagnostic tool gets no connection to the control unit. If the fault memory also cannot be cleared, a defect is likely. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is not a minor matter. It shows that the system has detected a fault, even if it only lights up now and then.

Which vehicles is the 89170-0C200 fitted in?

The airbag control unit 89170-0C200 from Toyota is fitted in these vehicles: Toyota Tundra K20 (2000-2006). You can check whether your vehicle is affected using the vehicle papers.

These vehicles are recorded for this part number:

• Toyota Tundra K20 (2000-2006)

Comparing the part number on the label with this page only confirms that you have the correct control unit in hand. Only the fault memory shows whether the unit itself is defective or whether a plug or a cable is causing the failure, so have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 89170-0C050, 89170-0C060.

How does the repair of the 89170-0C200 work?

Have the fault memory read out and attach the log, then disconnect the battery. Only after that remove the control unit, create a repair order online and send the unit in well packed.

At Airbag24, the unit is checked on the test bench. Defective components are replaced, stored crash data is erased and a function test is carried out. Processing usually takes 3–4 working days, and this covers only the checking, repairing and testing; afterwards the unit 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 89170-0C200 get to Airbag24?

You send the control unit 89170-0C200 to Airbag24 as a parcel, or you book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

Enclose the printed repair order with the parcel, and the unit must be packed shock-proof.