Airbag control unit with part number 89170-08080

What does the airbag control unit 89170-08080 do?

The airbag control unit 89170-08080 coordinates the entire restraint system (SRS) at Toyota. It processes the signals from the crash sensors and decides within milliseconds in an impact which airbags and seatbelt pretensioners are triggered. It reports faults via the airbag warning light.

The evaluation runs all the time. While driving, the control unit checks the connected components and stores irregularities as faults.

After an accident it records crash data and locks itself.

Why does the control unit 89170-08080 fail?

The most common cause is crash data stored after an accident, even without an airbag being triggered. Other causes include ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it in a targeted way during the repair.

The other causes relate to the age of the components, the moisture in the vehicle and the on-board voltage. A weak battery or jump-starting can produce voltage spikes that strain the electronics.

How can you tell that the 89170-08080 is defective?

A defect shows up as an airbag warning light in the instrument cluster that stays on permanently or intermittently, as a fault message, and as a diagnostic tool without connection. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

A fault memory that cannot be emptied also points to the malfunction. The warning light is the most visible sign; if it comes on, have the system checked promptly.

Which vehicles is the 89170-08080 fitted in?

The control unit 89170-08080 is installed at Toyota in these vehicles: Toyota Sienna XL20 (2004-2005) and XL20 Facelift (2006-2010).

The models in which it is used are listed here:

• Toyota Sienna XL20 (2004-2005)
• Toyota Sienna XL20 Facelift (2006-2010)

Two checks come before removal. Comparing the part number on the label with this page only confirms that you hold the correct unit. The fault memory, on the other hand, shows whether the control unit itself is defective or a plug or cable is causing the fault, so have it read out beforehand.

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

How does the repair of the 89170-08080 work?

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

Airbag24 examines the unit on the test bench and replaces defective components. Afterwards the stored crash data is erased and a function test is carried out.

Processing at Airbag24 usually takes 3–4 working days. Your own unit is then returned 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 89170-08080 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 control unit from Airbag24 back to you.

Enclose the printed repair order and pack the unit shockproof.