Walker Products 350-34322 center oxygen sensor for the 2001-2004 Subaru Outback H6 3.0L, the 2004-2012 Outback H4 2.5L and other vehicles measures the oxygen content of the exhaust gas. This Walker Products oxygen sensor is a 4-wire, narrow-band, direct-fit unit.
- 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 made of a gas-permeable platinum layer
- Gives the ECU the diagnostic feedback its specific application and position require
Quick facts
- Part: Walker Products 350-34322 center oxygen sensor
- Fits: the 2001-2004 Subaru Outback H6 3.0L, the 2004-2012 Outback H4 2.5L and other vehicles
- Position: Center, downstream
- Condition: New
A failing sensor can show up as an engine that runs poorly, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. A damaged wiring harness or connector, or another engine problem, can produce these symptoms too, so find the cause before replacing the sensor.
Fits
This listing is one sensor, and each vehicle takes one. It is an oxygen sensor replacement for the 2001-2004 Subaru Outback H6 3.0L and the 2004-2012 Outback H4 2.5L, and it fits the 2005-2010 Subaru Forester H4 2.5L as well. It is also an oxygen sensor for the 2002-2005 Subaru Impreza H4 2.0L and the 2004-2014 Impreza H4 2.5L. If your car is not named here, run its year, model and engine through the "Vehicles it fits" section to see whether this sensor is matched to it.
Specifications
Fit and size
- Position: center, downstream
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
- Number of wires: 4
Build and materials
- Type: narrow-band, direct fit
- Electrodes: gas-permeable platinum layer
- Coating: protects the electrode surfaces
- Condition: New
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this O2 sensor right for the 2004-2012 Subaru Outback H4 2.5L?
Yes. Walker Products 350-34322 is listed for the 2004-2012 Subaru Outback H4 2.5L, and the car takes one sensor in the center, downstream position.
Will Walker Products 350-34322 work as a 2005 Subaru Outback O2 sensor on the H4 2.5L engine?
Yes. The 2005 model year falls inside the 2004-2012 Subaru Outback H4 2.5L listing for Walker Products 350-34322, and the car takes one.
Is this a narrow-band or a wideband oxygen sensor?
It is narrow-band. Walker Products 350-34322 is a 4-wire, direct-fit narrow-band oxygen sensor with an M18 - 1.5 thread.
What signs can a failing downstream oxygen sensor cause?
An engine that runs poorly, higher fuel consumption, more exhaust emissions or a lit malfunction indicator light. A shop can read the codes stored in the ECU to see which sensor is involved.
What does the coating on this oxygen sensor do?
The coating keeps combustion residue and particulates in the exhaust from contaminating or eroding the electrode surfaces. The electrodes themselves are made of a gas-permeable platinum layer.
