Walker Products 350-34277 oxygen sensor for the 2010 Toyota 4Runner 4-cylinder 2.7L, the 2010-2020 4Runner V6 4.0L and other vehicles measures the oxygen content of the exhaust gas. The Walker Products oxygen sensor is a narrow-band, 4-wire, direct-fit unit that sends the ECU the diagnostic feedback it needs.
- Narrow-band design that monitors the air-fuel ratio for combustion efficiency
- Electrodes made of a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Made for its specific application and sensor position
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 350-34277 oxygen sensor
- Fits: the 2010 Toyota 4Runner 4-cylinder 2.7L, the 2010-2020 4Runner V6 4.0L and other vehicles
- Position: Downstream, upstream left, upstream right, downstream left, downstream right
- Condition: New
A failing sensor can show up as rough running, higher fuel use, higher exhaust emissions or a lit malfunction indicator light. Because the sensor is not the only possible source of these signs, look over the sensor, its wiring harness and the connector for physical damage, with the engine off and cool, before you replace it.
Fits
This direct-fit sensor is listed for a wide range of Toyota and Lexus models. It also covers the 2000-2004 Toyota Tundra V8 4.7L, and it works as a Toyota Sequoia oxygen sensor for the 2001-2004 V8 4.7L and as a 2003 Toyota 4Runner oxygen sensor for the V8 4.7L. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Position: Downstream, upstream left, upstream right, downstream left, downstream right
- Quantity per application: 1
- Thread size: M18 - 1.5
- Number of wires: 4
Build and materials
- Type: Narrow-band, direct fit
- Electrodes: gas-permeable platinum layer
- Condition: New
In the box
One oxygen sensor. This listing is a single sensor, and the fitment lists a quantity of one per application.
Interchange: CTK-OSTO4016
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this the right Toyota Tundra oxygen sensor for a 2000-2004 truck with the V8 4.7L?
Yes. Walker Products 350-34277 is listed for the 2000-2004 Toyota Tundra V8 4.7L, with a quantity of one per application.
Is this a 2004 Toyota 4Runner O2 sensor for the V8 4.7L?
Yes. Walker Products 350-34277 is listed for the 2003-2004 Toyota 4Runner V8 4.7L, with a quantity of one per application.
What thread size and wire count does this narrow-band oxygen sensor have?
It has an M18 - 1.5 thread and four wires, in a narrow-band, direct-fit design.
What can a failing oxygen sensor cause?
A failed sensor can lead to rough running, higher fuel use, higher exhaust emissions or a malfunction indicator light. A shop can read the stored codes to see which sensor is involved.
Does CTK-OSTO4016 interchange with this Walker oxygen sensor?
Yes. CTK-OSTO4016 is listed as an interchange number for Walker Products 350-34277.
