Airbag control unit with part number 89170-08030

What does the airbag control unit 89170-08030 do?

As the central control unit of the SRS at Toyota, the airbag control unit 89170-08030 evaluates the sensor data. In a crash it decides within milliseconds which airbags and seatbelt pretensioners fire, and it monitors the system continuously. Faults are indicated via the airbag warning light.

The unit checks sensors, firing circuits and wiring in the background. If it detects a fault, it writes it to the fault memory.

After an accident the unit stores crash data and locks itself.

Why does the control unit 89170-08030 fail?

Stored crash data is the most common cause, even if no airbag was triggered in the accident. Other causes include ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

A normal diagnostic tool cannot erase crash data. Airbag24 removes it during the repair.

The other causes relate to the age of the components, to moisture and to voltage spikes. The latter arise, for example, from a weak battery or from jump-starting.

How can you tell that the 89170-08030 is defective?

Typical is an airbag warning light that stays on permanently or intermittently. Fault messages, a missing connection to the diagnostic tool or a fault memory that cannot be cleared also point to the malfunction.

• Airbag warning light in the instrument cluster, permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. The warning light indicates the fault, which is why prompt checking makes sense.

Which vehicles is the 89170-08030 fitted in?

In these Toyota vehicles the control unit 89170-08030 is fitted: Toyota Sienna XL20 (2004-2005) and XL20 Facelift (2006-2010).

The affected models at a glance:

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

Before removal there are two checks. Compare the part number on the label with this page; this only confirms that it is the correct unit. Have the fault memory read out, because its contents show whether the control unit is defective or a plug or cable is the cause.

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 89170-08030 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, only then remove the control unit 89170-08030, create a repair order online and send the unit in well packed.

Airbag24 tests the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. The unit is then returned to you.

Processing takes 3–4 working days as a rule, after which your 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 89170-08030 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order in the parcel and pack the unit shockproof.