Walker Products 350-64044 left oxygen sensor for the 2015-2019 Subaru Outback H6 3.6L, the 2020-2024 Outback H4 2.5L and other vehicles measures the oxygen in the exhaust gas to show how efficiently the engine is burning fuel. It is a wide-band, four-wire sensor made for its specific application and position, and it gives the ECU the diagnostic feedback it needs.
- Oxygen readings help monitor the air-fuel ratio and fine-tune the mixture to support fuel economy
- Electrodes are coated with a gas-permeable platinum layer
- Coating protects the electrode surfaces from contamination and erosion by combustion residue and exhaust particulates
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 350-64044 oxygen sensor
- Fits: the 2015-2019 Subaru Outback H6 3.6L, the 2020-2024 Outback H4 2.5L and other vehicles
- Position: Upstream, upstream left
- Condition: New
Rough running, higher fuel use or a lit malfunction indicator light can come from a failing oxygen sensor. Those signs alone don't prove the sensor is the problem, since an exhaust leak is another common cause. The sensor, wiring harness and connector can be inspected for physical damage.
Fits
This sensor fits the 2015-2019 Subaru Outback H6 3.6L and the 2020-2024 Outback H4 2.5L. It is also an oxygen sensor for the 2011-2012 Toyota Sienna 4-cylinder 2.7L, the 2015-2019 Subaru Legacy H6 3.6L and the 2020-2024 Legacy H4 2.5L.
Specifications
Fit and size
- Position: upstream, upstream left
- Quantity for this position: 1
- Thread: M18 - 1.5
- Wiring harness length: 225 mm
Build and materials
- Sensor type: wide-band, heated
- Wires: 4, wire gauge 20
- Connector: square, male; spade terminals, male
- Mounting: threaded
- Electrode coating: gas-permeable platinum layer
- Condition: new
- Country of origin: United States
In the box
One oxygen sensor. The upstream left position takes one.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is this a Subaru Outback oxygen sensor replacement for the 2015-2019 H6 3.6L or the 2020-2024 H4 2.5L?
Yes. Walker Products 350-64044 fits the 2015-2019 Subaru Outback H6 3.6L and the 2020-2024 Outback H4 2.5L. It is the upstream left sensor.
Is this Walker Products oxygen sensor a wide-band type?
Yes. Walker Products 350-64044 is a heated wide-band sensor with four wires, a male square connector and male spade terminals.
What thread size and harness length does this left oxygen sensor have?
This oxygen sensor has a threaded M18 - 1.5 mounting and a 225 mm wiring harness.
Which signs can mean this wide-band oxygen sensor is failing?
Rough running, higher fuel use or a lit malfunction indicator light can be signs. With the engine off and cool, you can look over the sensor, harness and connector for visible damage.
What protects the electrodes on this oxygen sensor?
The electrodes carry a gas-permeable platinum layer. Its coating guards the electrode surfaces against contamination and erosion from combustion residue and exhaust particulates.
