Airbag control unit with part number 89170-0C672

What does the airbag control unit 89170-0C672 do?

As the central control unit of the restraint system (SRS) of Toyota, the airbag control unit 89170-0C672 controls the triggering of airbags and seatbelt pretensioners. It evaluates the crash sensors and decides within milliseconds in an accident.

The unit checks the entire system constantly. It shows faults via the airbag warning light in the instrument cluster.

An accident ends for the unit with stored crash data and a lock.

Why does the control unit 89170-0C672 fail?

For the 89170-0C672, the most common cause is a crash data entry from an accident, even when no airbag has triggered. Aged components, contact problems caused by moisture or corrosion, and voltage spikes are also involved.

Crash data is also created when no airbag has deployed, and it stays in the unit until removed. An ordinary diagnostic tool does not remove it.

Besides the crash data, electronic components age, and solder joints can go cold.

Moisture and corrosion at plug connections, as well as voltage spikes, for example with a weak battery or jump-starting, further strain the electronics. Airbag24 deletes the crash data during the repair.

How can you tell that the 89170-0C672 is defective?

A defect in the 89170-0C672 becomes visible when the airbag warning light in the instrument cluster stays on permanently or intermittently.

Also an error message in the instrument cluster, a diagnostic tool without connection to the control unit, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. The light is therefore not a sign you should overlook.

Which vehicles is the 89170-0C672 fitted in?

This 89170-0C672 is found in the following vehicles: Toyota Tundra K40 (from 2021); Toyota Sequoia K30 (from 2022).

The assignment is shown in this list:

• Toyota Tundra K40 (from 2021)
• Toyota Sequoia K30 (from 2022)

Before sending it in, there are two checks. First, comparing the part number on the label with this page, which only confirms that it is the right unit. Second, have the fault memory read out, as it 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 89170-34060.

How does the repair of the 89170-0C672 work?

The first step is the fault memory: have it read out and attach the log. Then disconnect the battery and remove the control unit 89170-0C672. Processing at Airbag24 usually takes 3–4 working days.

Then record the repair order online and pack the unit carefully.

At Airbag24 the unit is examined on the test bench, defective components are repaired, stored crash data is deleted and a function test is carried out. Afterwards your own unit goes back to you.

This sequence is mandatory for 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 89170-0C672 get to Airbag24?

One parcel is enough: send the 89170-0C672 in, or book a UPS collection for an extra charge. After the repair the unit goes back from Airbag24 to you by UPS.

Enclose the printed repair order and shock-resistant packaging for the control unit.