Airbag control unit with part number 89170-35460

What does the airbag control unit 89170-35460 do?

The airbag control unit 89170-35460 is the control unit of the SRS system in Toyota. It reads the crash sensors and decides within milliseconds in an accident which airbags and seatbelt pretensioners respond.

It also constantly monitors all connected components. If it detects a fault, the airbag warning light in the instrument cluster lights up.

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

Why does the control unit 89170-35460 fail?

Most often crash data stored after an accident is responsible, even if no airbag has deployed at all. Other causes are aged electronics, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes, for example from a weak battery or a jump start.

This data cannot be erased with a standard diagnostic tool, and such a tool cannot reach it.

The other causes are rather general: electronics age, solder joints can lose contact, and damp or rust on the plugs also has an effect.

How can you tell that the 89170-35460 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-35460, either permanently or intermittently. In addition, the instrument cluster shows a fault message, the diagnostic tool does not find the control unit, and the fault memory cannot be reset.

Airbags and seatbelt pretensioners may then fail to deploy in an emergency. Therefore look into the warning promptly, even if the car otherwise drives normally.

Which vehicles is the 89170-35460 fitted in?

Check your car against the overview before taking any action. The control unit 89170-35460 is fitted in these vehicles: Toyota 4Runner N280 2nd Facelift (2017-2024), N280 (2009-2013) and N280 1st Facelift (2013-2017).

The following vehicles are known to us for this part number:

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

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Whether the control unit is defective or a plug or cable is causing the fault is clarified only by the fault memory read out beforehand.

How does the repair of the 89170-35460 work?

First read out the fault memory and keep the log, then disconnect the battery and take the 89170-35460 out of the vehicle. Then create the repair order online and send in the well-packed unit. Airbag24 checks, repairs and tests it, usually within 3–4 working days, replaces defective components and erases stored crash data.

This period relates solely to the work at Airbag24. Reading out, removal and dispatch are not included.

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 89170-35460 get to Airbag24?

You send the control unit 89170-35460 as a parcel, or you book a UPS collection for an extra charge. After the repair is complete, Airbag24 brings the unit back to you by UPS.

A printed copy of the repair order goes into the parcel. Pad the unit so that it is shockproof.