Walker Products 250-54015 oxygen sensor for the 2000-2001 Subaru Outback H4 2.5L and other vehicles reads the oxygen in the exhaust gas to track the air-fuel ratio. It sits in the upstream position and sends the ECU the diagnostic feedback it needs.
- Monitors exhaust gases to help reduce pollutants
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and particulates
- Oxygen readings help fine-tune the air-fuel mixture to improve fuel economy
- Electrodes made of a gas-permeable platinum layer
- Wide-band air-fuel ratio sensor with 4 wires
Quick facts
- Part: Walker Products 250-54015 oxygen sensor
- Fits: 2000-2001 Subaru Outback H4 2.5L and other vehicles
- Position: Upstream
- Condition: New
A failing sensor can make the engine run poorly, raise fuel consumption and exhaust emissions, or turn on the malfunction indicator light. Several other faults can produce these symptoms, so with the engine off and cool, look over the sensor, wiring harness and connector for physical damage before you replace anything.
Fits
It is an oxygen sensor for the 1999-2001 Subaru Impreza H4 2.2L, the 1999 Subaru Legacy H4 2.2L and the 2000-2001 Legacy H4 2.5L, as well as the 2000-2001 Subaru Outback H4 2.5L.
Specifications
Fit and size
- Position: Upstream
- Quantity per vehicle: 1
- Number of wires: 4
Build and materials
- Type: wide-band air-fuel ratio sensor
- Electrodes: gas-permeable platinum layer
- Coating on the electrode surfaces
- Condition: New
In the box
One oxygen sensor. This listing is a single sensor, and the vehicles it fits take one sensor each.
Frequently Asked Questions
Is this the Subaru Outback oxygen sensor replacement for the 2000-2001 Subaru Outback H4 2.5L?
Yes. Walker Products 250-54015 is an upstream oxygen sensor listed for the 2000-2001 Subaru Outback H4 2.5L, and that engine takes one.
Is this a 2000 Subaru Outback oxygen sensor for the H4 2.5L engine?
Yes. The 2000 model year falls inside the 2000-2001 Subaru Outback H4 2.5L fitment, and the sensor goes in the upstream position.
Is this Walker Products oxygen sensor a wide-band type?
Yes. Walker Products 250-54015 is a 4-wire wide-band air-fuel ratio sensor, and its electrodes are made of a gas-permeable platinum layer.
What signs can show a failing upstream oxygen sensor?
The engine can run poorly, fuel consumption and exhaust emissions can rise, or the malfunction indicator light can come on.
Is Walker Products 250-54015 sold as a single oxygen sensor?
Yes. This listing is one oxygen sensor, and the fitment gives a quantity of one per vehicle.
