Walker Products 250-54026 left oxygen sensor for the 2004-2010 Volvo S40 5-cylinder 2.4L and other vehicles measures the oxygen in the exhaust gas to track combustion efficiency. This Walker Products oxygen sensor is a 4-W wide-band air-fuel ratio unit that gives the ECU the diagnostic feedback it needs.
- Measures oxygen levels so the air-fuel mixture can be fine-tuned, which supports fuel economy
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates in the exhaust
- Electrodes made of a gas-permeable platinum layer
- Monitors exhaust gases to help reduce pollutants
- Made for its specific application and fitment position
Quick facts
- Part: Walker Products 250-54026 oxygen sensor
- Fits: 2004-2010 Volvo S40 5-cylinder 2.4L and other vehicles
- Position: Upstream, upstream left
- Condition: New
A failing sensor can show up as rough running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. A damaged wiring harness or connector, or an exhaust leak, can be behind those signs too, so find the cause before buying a sensor. With the engine off and cool, look the sensor, harness and connector over for physical damage.
Fits
This upstream oxygen sensor is a direct-fit replacement for the 2004-2010 Volvo S40 5-cylinder 2.4L, the 2005-2010 Volvo V50 5-cylinder 2.4L and the 2007 Volvo S80 V8 4.4L. Driving a different Volvo? Look up your own year and engine in the "Vehicles it fits" section before you order.
Specifications
Fit and size
- Position: Upstream, upstream left
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: wide-band air-fuel ratio sensor, 4-W
- Electrodes: gas-permeable platinum layer
- Coating: protects the electrode surfaces
- Condition: New
In the box
One oxygen sensor for the upstream left position. The fitment lists one for this position, and any other sensor position on the vehicle is a separate part.
Frequently Asked Questions
Is this Volvo S40 oxygen sensor right for the 2004-2010 model with the 5-cylinder 2.4L?
Yes. Walker Products 250-54026 is a left upstream sensor for the 2004-2010 Volvo S40 5-cylinder 2.4L. If your Volvo is not that one, look up its year and engine in the "Vehicles it fits" section.
Does this Volvo S80 oxygen sensor fit the 2007 Volvo S80 V8 4.4L?
Yes. Walker Products 250-54026 fits the 2007 Volvo S80 V8 4.4L, and the fitment lists one sensor for this position.
Is this oxygen sensor wide-band or narrow-band?
It is a wide-band air-fuel ratio sensor, listed as 4-W. It measures the oxygen content of the exhaust gas to monitor the air-fuel ratio for combustion efficiency.
Can a bad oxygen sensor turn on the check engine light?
It can. A failed sensor can cause poor running, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light, and newer vehicles may store a related fault code in the ECU.
What is the coating on this wide-band oxygen sensor for?
The coating keeps combustion residue and particulates in the exhaust from contaminating or eroding the electrode surfaces, which are made of a gas-permeable platinum layer.
