Walker Products 350-34474 oxygen sensor for the 2014-2015 Lexus IS250 V6 2.5L and other vehicles measures the oxygen in the exhaust gas to show combustion efficiency. It is a narrow-band, 4-wire direct-fit sensor.
- Built for a specific application and fitment position, with the diagnostic feedback the ECU requires
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Measures oxygen levels so the air-fuel mixture can be fine-tuned, which helps support fuel economy
- Monitors exhaust gases to help keep pollutants down
- Electrodes with a gas-permeable platinum layer
Quick facts
- Part: Walker Products 350-34474 oxygen sensor
- Fits: 2014-2015 Lexus IS250 V6 2.5L and other vehicles
- Position: Downstream, downstream left, downstream right, downstream front
- Condition: New
A failing sensor can show up as rough running, higher fuel use, more exhaust emissions or a lit check engine light, though those symptoms also have other sources. With the engine off and cool, look over the sensor, its wiring harness and its connector for physical damage. If the sensor is the cause, this one replaces it.
Fits
This sensor is listed for a wide range of Lexus and Toyota models. It works as a Lexus IS250 oxygen sensor replacement for the 2014-2015 model with the V6 2.5L, and it also fits the 2004-2009 Toyota Prius 4-cylinder 1.5L and the 1998-2000 Toyota Sienna V6 3.0L. If your car is not one of these, look up its year, make and engine in the "Vehicles it fits" section of this page.
Specifications
Fit and size
- Position: Downstream, downstream left, downstream right, downstream front
- Quantity per vehicle: 1
- Number of wires: 4
- Thread size: M18 - 1.5
Build and materials
- Type: Narrow-band, direct fit
- Electrodes: gas-permeable platinum layer
- Electrode coating: protects against contamination and erosion
- Condition: New
In the box
One oxygen sensor. The fitment lists one sensor per vehicle.
Interchange: CTK-OSTO4003
Frequently Asked Questions
Is 350-34474 the Toyota Sienna oxygen sensor for the 1998-2000 model with the V6 3.0L?
Yes. Walker Products 350-34474 is listed for the 1998-2000 Toyota Sienna V6 3.0L, with a quantity of one per vehicle.
Is this the Toyota Prius oxygen sensor for a 2004-2009 model with the 4-cylinder 1.5L engine?
Yes. It is listed for the 2004-2009 Toyota Prius 4-cylinder 1.5L. For any other car, check the "Vehicles it fits" section.
Is the Walker Products 350-34474 a narrow-band or wideband oxygen sensor?
Walker Products 350-34474 is a narrow-band, 4-wire direct-fit oxygen sensor with an M18 - 1.5 thread.
Is this a downstream oxygen sensor?
Yes. It is listed for the downstream position, covering downstream left, downstream right and downstream front.
What is the coating on this oxygen sensor for?
The coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates in the exhaust. The electrodes carry a gas-permeable platinum layer.
