Airbag control unit with part number 89170-07401

What does the airbag control unit 89170-07401 do?

The airbag control unit 89170-07401 coordinates the restraint system (SRS) in vehicles from Toyota. In a crash it checks the signals from the crash sensors and fires the appropriate airbags and seatbelt pretensioners within milliseconds. After an accident it saves crash data and then blocks its further function.

In day-to-day operation the unit checks sensors, airbags, seatbelt pretensioners and the connections between them. It registers any faults it finds and reports them via the airbag warning light.

This monitoring hardly stands out in everyday use, but it is decisive in an emergency.

Why does the control unit 89170-07401 fail?

The most common cause is crash data saved after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes also play a part.

Crash data are where the search for the cause begins, because they remain in memory even when no airbag has opened.

The other causes concern hardware and contacts. Electronic components age, and solder joints can go cold.

Moisture and corrosion attack plug connections. Voltage spikes, for example with a weak battery or during a jump start, can stress components. At Airbag24, saved crash data are erased during the repair.

How can you tell that the 89170-07401 is defective?

A defect shows up as the airbag warning light in the instrument cluster, which stays on permanently or intermittently, and as an error message. If the diagnostic tool cannot connect to the control unit, or the fault memory cannot be cleared, this also points to a problem. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

A warning light may also come on only briefly and then go out again. The fault can still be stored in memory.

Therefore take every warning seriously and have the system checked promptly.

Which vehicles is the 89170-07401 fitted in?

The 89170-07401 is fitted in these vehicles: Toyota Avalon XX50 Facelift (from 2022) and XX50 (2018-2022). The part number is what counts, not an individual model name.

The overview shows the assigned models:

• Toyota Avalon XX50 Facelift (from 2022)
• Toyota Avalon XX50 (2018-2022)

Before you send the unit in, check one point. Comparing the part number on the label with this page confirms that you have the correct unit. Whether the control unit itself is defective, however, is shown only by a read-out fault memory, because a plug or cable can also be the cause.

How does the repair of the 89170-07401 work?

You start by reading out the fault memory and attach the log to the unit. Then disconnect the battery and afterwards remove the control unit. Finally create a repair order online and pack the unit well.

At Airbag24, the unit is examined on the test bench, defective components are replaced, stored crash data are erased and a functional test is carried out. Processing at Airbag24 usually takes 3–4 working days. 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 89170-07401 get to Airbag24?

You have two options: send the unit in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The printed repair order goes into the parcel. Pack the control unit shock-proof so that it survives shipping undamaged.