Airbag control unit with part number 89170-0C573

What does the airbag control unit 89170-0C573 do?

The airbag control unit 89170-0C573 is the central control unit of the restraint system (SRS) for Toyota. It evaluates the signals from the crash sensors, determines within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. After a crash it stores crash data and locks itself; the lock is lifted only by the repair.

Why does the control unit 89170-0C573 fail?

Stored crash data is the most common cause: after an accident it remains in the unit, even if no airbag has been triggered, and a normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

During the repair at Airbag24 the crash data is erased, and the unit is checked for the other causes.

Aged electronic components and cold solder joints develop over time. Moisture and corrosion attack plug connections, and voltage spikes, for example from a weak battery or a jump start, can stress components.

How can you tell that the 89170-0C573 is defective?

A defect shows as the airbag warning light in the instrument cluster lighting up permanently or intermittently. In addition, an error message, a missing connection to the diagnostic tool, or a fault memory that cannot be cleared may occur.

• The airbag warning light is on permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool cannot connect to the control unit.
• The fault memory cannot be cleared.

With these signs, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light shows the defect directly, so a prompt check is worthwhile.

Which vehicles is the 89170-0C573 fitted in?

The airbag control unit 89170-0C573 is fitted in these vehicles: Toyota Tundra K30 (2007-2021).

The following list shows the vehicles recorded for this unit.

• Toyota Tundra K30 (2007-2021)

Compare the part number on the label of the removed unit with this page to make sure it is the right unit. Whether the control unit itself is defective is shown only by a fault memory read out beforehand. This log also reveals whether 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 89170-0C573 work?

First have the fault memory read out and attach the log. Then disconnect the battery, and only then remove the control unit. Then create a repair order online and send in the unit.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days.

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 89170-0C573 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, UPS brings the unit back to you from Airbag24.

The printed repair order goes into the parcel, and the unit is packed shock-proof.