Walker Products 250-24656 oxygen sensor for the 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2007 Focus 4-cylinder 2.0L measures the oxygen content of the exhaust gas. Made for its specific application and downstream position, it sends the ECU the diagnostic feedback the system expects.
- Measures oxygen in the exhaust gas to monitor the air-fuel ratio for combustion efficiency
- Monitors exhaust gases to help reduce pollutants
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Electrodes with a gas-permeable platinum layer
- Narrow-band sensor with 4 wires
Quick facts
- Part: Walker Products 250-24656 oxygen sensor
- Fits: 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2007 Focus 4-cylinder 2.0L
- Position: Downstream
- Condition: New
A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. Before replacing it, look over the sensor, its wiring harness and its connector for physical damage with the engine off and cool, because the fault may be in the wiring rather than the sensor.
Fits
This is a direct-fit downstream oxygen sensor for the 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2007 Focus 4-cylinder 2.0L.
Specifications
Fit and size
- Position: downstream
- Quantity per vehicle: 1
- Wires: 4
Build and materials
- Type: narrow-band
- Electrodes: gas-permeable platinum layer
- Coating: on the electrode surfaces
- Condition: new
In the box
This listing is one oxygen sensor, and the application takes one in the downstream position.
Frequently Asked Questions
Is this the right oxygen sensor for a 2003 Ford Focus 4-cylinder 2.3L?
Yes. Walker Products 250-24656 fits the 2003-2007 Ford Focus 4-cylinder 2.3L and the 2005-2007 Focus 4-cylinder 2.0L, and it goes in the downstream position.
Is the Walker Products 250-24656 an upstream or downstream sensor?
The Walker Products 250-24656 is a downstream oxygen sensor. It is a narrow-band type with 4 wires.
What protects the electrodes on this narrow-band oxygen sensor?
A coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates in the exhaust gas. The electrodes use a gas-permeable platinum layer.
Could a failing downstream oxygen sensor cause rough running or a warning light?
Yes, it can show up as rough running, higher fuel consumption or a lit malfunction indicator light, though other faults can look the same. A shop can read the codes stored in the ECU.
Is this oxygen sensor made for a specific application and fitment position?
Yes. Each Walker Products part number is made for its specific application and fitment position, so it sends the diagnostic feedback the ECU needs.
