Walker Products 350-34370 center oxygen sensor for the 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2011 Focus 4-cylinder 2.0L measures the amount of oxygen in the exhaust gas. Each part number is made for its specific application and fitment position, and it gives the ECU the diagnostic feedback it needs.
- Electrodes made of a gas-permeable platinum layer
- Measures oxygen levels to help fine-tune the air-fuel mixture and support fuel economy
- Tracks the oxygen content of the exhaust gas to monitor the air-fuel ratio for combustion efficiency
- Coating protects the electrode surfaces from combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 350-34370 oxygen sensor
- Fits: 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2011 Focus 4-cylinder 2.0L
- Position: Center, downstream
- Condition: New
A failing oxygen sensor can show up as rough running, higher fuel use, more exhaust emissions or a lit malfunction indicator light. Before you replace the sensor, look over its wiring harness and connector for physical damage, since damage there can also shorten a sensor's life.
Fits
This sensor fits the 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2011 Focus 4-cylinder 2.0L, and each takes one. This listing is a single sensor for the center, downstream position.
Specifications
Fit and size
- Position: Center, downstream
- Quantity per vehicle: 1
- Thread: M18 - 1.5
Build and materials
- Type: Narrow-band
- Wires: 4
- Electrodes: Gas-permeable platinum layer
- Condition: New
Interchange: CTK-OSFD4014
Frequently Asked Questions
Does the Walker 350-34370 oxygen sensor fit a 2005-2011 Ford Focus 4-cylinder 2.0L?
Yes. Walker Products 350-34370 fits the 2005-2011 Ford Focus 4-cylinder 2.0L and the 2003-2007 Ford Focus 4-cylinder 2.3L, in the center, downstream position.
Is the Walker 350-34370 a narrow-band oxygen sensor?
Yes. Walker Products 350-34370 is a narrow-band oxygen sensor with four wires and an M18 - 1.5 thread.
What can a failing oxygen sensor cause?
A failed sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Newer vehicles may also store a fault code related to the sensor.
What does the coating on this Walker oxygen sensor protect?
The coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust gases. The electrodes themselves are a gas-permeable platinum layer.
Does this oxygen sensor help fuel economy and emissions?
It measures oxygen levels to help fine-tune the air-fuel mixture, which supports fuel economy. It also monitors exhaust gases to help reduce pollutants.
