Airbag control unit with part number 89170-07280

What does the airbag control unit 89170-07280 do?

The airbag control unit 89170-07280 is responsible for the restraint system (SRS) in Toyota vehicles. It evaluates the crash sensors, decides in a collision whether airbags and seatbelt pretensioners are triggered, and monitors the entire system. After an accident it stores crash data and locks itself.

Monitoring runs in the background and covers wiring, sensors and ignition circuits. If the unit detects a fault, it creates a fault entry and lets the airbag warning light come on.

If this control unit fails, there is no check on whether the system will work in an emergency.

Why does the control unit 89170-07280 fail?

Stored crash data from an accident is the most common cause, even if no airbag was deployed in it. Ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes can also cause the failure. A standard diagnostic tool does not remove the crash data.

The data record what the control unit measured during the event. They remain in memory even if the damage to the vehicle is barely recognisable.

Ageing components lose reliability, solder joints can lose contact, and moisture attacks plug connections. Voltage spikes arise, for example, from a weak battery or when jump-leads are connected.

How can you tell that the 89170-07280 is defective?

A defect shows up as an airbag warning light that lights up permanently or intermittently, as a fault message in the instrument cluster, as a diagnostic tool with no connection to the control unit 89170-07280, or as a fault memory that cannot be cleared. In that case, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

The warning light is the indication that is noticed fastest. However, it only reports the fault the unit has detected itself, which is why a check with the diagnostic tool remains sensible.

A fault message in the instrument cluster shows that the restraint system is not fully ready for use. Do not leave the message unchecked.

Which vehicles is the 89170-07280 fitted in?

The control unit 89170-07280 is fitted in the following vehicles of Toyota: Toyota Avalon XX30 1st Facelift (2008-2010), XX30 (2005-2007) and XX30 2nd Facelift (2010-2012). These details can be compared with your own vehicle.

The following list shows the vehicles known to us.

• Toyota Avalon XX30 1st Facelift (2008-2010)
• Toyota Avalon XX30 (2005-2007)
• Toyota Avalon XX30 2nd Facelift (2010-2012)

Comparing the number on the label of the unit with this page only confirms that it is the matching control unit. Have the fault memory read out before removal, because only then does it become clear 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 89170-07200, 89170-07221, 89170-07230, 89170-07240.

How does the repair of the 89170-07280 work?

First have the fault memory read out and attach the log. In the second step, disconnect the battery; only after that comes the removal of the control unit 89170-07280. Finally, create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and performs a function test. Processing at Airbag24 usually takes 3–4 working days. Then 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 89170-07280 get to Airbag24?

You send the control unit 89170-07280 as a parcel or book a UPS collection for an extra charge. After the repair, UPS brings the unit from Airbag24 back to you.

Put the printed repair order into the parcel and pack the unit shock-proof.