Airbag control unit with part number 89170-08190

What does the airbag control unit 89170-08190 do?

The airbag control unit 89170-08190 is the central control unit of the restraint system (SRS) in Toyota vehicles. It reads the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners to trigger, and checks the system continuously.

While driving, the unit continuously checks the components around it within the system. If it detects a fault, it switches on the airbag warning light in the instrument cluster.

After an accident, the control unit stores crash data and locks itself. This behaviour is part of how the unit is designed.

Why does the control unit 89170-08190 fail?

The most common cause is a crash data lock stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot remove the data, so the fault persists.

Behind this may be changes that creep in over time. Electronics age, and solder joints can go cold. Moisture and corrosion at the plug connections are also typical problems.

Voltage spikes, for example from a weak battery or after jump-starting, can also play a role. Airbag24 deletes the crash data during the repair.

How can you tell that the 89170-08190 is defective?

A defect shows itself mainly through an airbag warning light that stays on permanently or intermittently. In addition, a fault message appears in the instrument cluster, and the diagnostic tool finds no connection to the control unit.

• The airbag warning light stays on permanently or intermittently.
• A fault message appears in the instrument cluster.
• The diagnostic tool cannot reach the control unit.
• The fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Have the system checked promptly.

Which vehicles is the 89170-08190 fitted in?

The 89170-08190 is fitted in these vehicles: Toyota Sienna XL30 (2010-2020).

The unit is recorded for the following models:

• Toyota Sienna XL30 (2010-2020)

Have the fault memory read out before the control unit is removed. Then it can be established whether the control unit itself is defective or whether a plug or cable is the cause. Afterwards, compare the part number on the label of the removed unit with this page.

For the same vehicles, we also repair control units with the part numbers 89170-08040, 89170-08130, 89170-08140, 89170-08170, 89170-08230.

How does the repair of the 89170-08190 work?

Only once the fault memory has been read out and the log enclosed do you disconnect the battery. Then you remove the control unit, create the repair order online and send the unit in packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components and deletes the stored crash data. A function test follows, and then the unit comes 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 89170-08190 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back by UPS.

The printed repair order belongs in the parcel, and the unit should be packed shock-resistant.