Airbag control unit with part number 89170-08180

What does the airbag control unit 89170-08180 do?

The airbag control unit 89170-08180 controls the restraint system (SRS) in Toyota. It processes the crash sensor signals, decides in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After a crash it locks itself; only the repair lifts the lock.

The control unit checks wiring, sensors and triggers and records deviations in the fault memory.

Indications are displayed through the instrument cluster, above all via the airbag warning light.

Why does the control unit 89170-08180 fail?

The most common cause is stored crash data after an accident, even without an airbag having deployed; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The crash data arises in the control unit and remains stored there. Only the repair removes it.

The other causes at a glance:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 89170-08180 is defective?

The airbag warning light in the instrument cluster stays on permanently or comes on intermittently, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

The airbag warning light shows the defect, either permanently or during phases in which it lights up.

In addition there is an error message in the instrument cluster, and a diagnostic tool that cannot connect to the control unit. In this state, airbags and seatbelt pretensioners may fail to deploy in an emergency. A prompt check is therefore advisable.

Which vehicles is the 89170-08180 fitted in?

The control unit 89170-08180 is fitted in these vehicles: Toyota Sienna XL30 (2010-2020).

The following list shows the assignment in detail:

• Toyota Sienna XL30 (2010-2020)

Comparing the part number on the label with this page ensures that the unit fits. It does not clarify the cause. The read-out fault memory, by contrast, shows whether the control unit is defective or whether a plug or cable is the cause.

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 89170-08180 work?

First read out the fault memory and attach the log. Then disconnect the battery and only then remove the control unit 89170-08180. Next, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases crash data and carries out a function test. Afterwards your own 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 89170-08180 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.

Enclose the printed repair order, and pack the unit shockproof.