Walker Products 350-34310 rear oxygen sensor for the 2006-2010 Toyota Highlander V6 3.3L, the 2009-2014 Highlander 4-cylinder 2.7L, the 2011-2016 Highlander V6 3.5L and other vehicles measures the oxygen in the exhaust gas to gauge combustion efficiency. This Walker Products oxygen sensor has four wires, uses a narrow-band design and sends the ECU the diagnostic feedback its application calls for.
- Electrodes made of a gas-permeable platinum layer
- Oxygen readings help fine-tune the air-fuel mixture for fuel economy
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 350-34310 rear oxygen sensor
- Fits: the 2006-2010 Toyota Highlander V6 3.3L, the 2009-2014 Highlander 4-cylinder 2.7L, the 2011-2016 Highlander V6 3.5L and other vehicles
- Position: Downstream rear
- Condition: New
A failing oxygen sensor can make the engine run poorly, raise fuel consumption or exhaust emissions, or turn on the malfunction indicator light. Those signs alone do not prove the sensor is the problem; damage to the wiring harness or connector can also produce them, so inspect both for physical damage.
Fits
The 2006-2010 Toyota Highlander V6 3.3L, 2009-2014 Highlander 4-cylinder 2.7L, 2011-2016 Highlander V6 3.5L, 2010-2015 Lexus RX350 V6 3.5L and 2010-2015 Lexus RX450h V6 3.5L all take this direct-fit sensor, and so do many other vehicles. One sensor goes on each, and this listing is one. If your car is not one of these, run its year, make and engine through the "Vehicles it fits" section.
Specifications
Fit and size
- Position: downstream rear
- Quantity per vehicle: 1
- Number of wires: 4
Build and materials
- Type: narrow-band, direct fit
- Electrodes: gas-permeable platinum layer
- Condition: new
Frequently Asked Questions
Is this a Toyota Highlander oxygen sensor for the 2009-2014 Highlander 4-cylinder 2.7L?
Yes. Walker Products 350-34310 fits the 2009-2014 Toyota Highlander 4-cylinder 2.7L, and the 2006-2010 Highlander V6 3.3L and 2011-2016 Highlander V6 3.5L take it too. Each takes one.
Is this the Lexus RX350 oxygen sensor for the 2010-2015 RX350 V6 3.5L?
Yes. Walker Products 350-34310 fits the 2010-2015 Lexus RX350 V6 3.5L, and the 2010-2015 RX450h V6 3.5L takes it as well. For any other car, look it up in the "Vehicles it fits" section.
Is the 350-34310 a downstream or upstream oxygen sensor?
Downstream, in the rear position. It is a narrow-band sensor with four wires.
What is the platinum layer on this sensor's electrodes for?
The electrodes are made of a gas-permeable platinum layer. A coating over the electrode surfaces helps keep combustion residue and particulates in the exhaust from contaminating or eroding them.
Does this rear oxygen sensor send the ECU the diagnostic feedback it needs?
Yes. Each Walker Products part number is made for its specific application and fitment position, and this sensor is designed to provide the diagnostic system feedback the ECU requires.
