Airbag control unit with part number 89170-35450

What does the airbag control unit 89170-35450 do?

The 89170-35450 coordinates the airbags and seatbelt pretensioners in Toyota vehicles. From the signals of the crash sensors, it calculates within milliseconds which of them should deploy.

In addition, it monitors the system constantly. It shows faults via the airbag warning light in the instrument cluster.

After an accident, the unit records crash data and locks itself. It is therefore a central element for occupant protection.

Why does the control unit 89170-35450 fail?

The most common cause for the control unit 89170-35450 is crash data stored after an accident, even without an airbag deployment. A normal diagnostic tool cannot erase it.

Other possible causes at a glance:

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

How can you tell that the 89170-35450 is defective?

You recognise a defect in the 89170-35450 by the airbag warning light, which stays on continuously or intermittently in the instrument cluster. Also an error message, a diagnostic tool without connection, and a fault memory that cannot be cleared.

If the indication persists, airbags and seatbelt pretensioners may not be able to deploy in an emergency. The warning light is therefore a sign you should look into promptly.

Whether the control unit itself is affected is determined by reading out the fault memory. The warning light alone says nothing about that.

Which vehicles is the 89170-35450 fitted in?

The control unit 89170-35450 is listed for Toyota vehicles. It is fitted in the following vehicles: Toyota 4Runner N280 2nd Facelift (2017-2024), N280 (2009-2013) and N280 1st Facelift (2013-2017).

The list reflects the vehicles on record:

• Toyota 4Runner N280 2nd Facelift (2017-2024)
• Toyota 4Runner N280 (2009-2013)
• Toyota 4Runner N280 1st Facelift (2013-2017)

First compare the part number on the label of the removed unit with this page. That only shows that you have the right unit in front of you. Also have the fault memory read out before removal, because only then can you tell whether the control unit is defective or a plug or cable is the cause.

How does the repair of the 89170-35450 work?

First have the fault memory read out, attach the log, disconnect the battery, and remove the control unit 89170-35450. Then create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit passes through the test bench: defective components are replaced, crash data is erased, and a function test completes the repair.

Afterwards your own 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 89170-35450 get to Airbag24?

You send your control unit 89170-35450 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-resistant.