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Denso Air Fuel Ratio Oxygen O2 Sensor Upstream For Subaru Forester WRX 2.0L H4 Product Overview Item Details: One x 234-5178 - Denso - Air Fuel Ratio Oxygen O2 Sensor - Upstream Specifications:O2 Sensor Configuration: Direct FitPosition: UpstreamSensor Type: HeatedConnector Gender: MaleWires Quantity: 5 Wire LeadsWire Harness Length: 11.5" (292.1 mm)Thread Diameter: 0.71" (18 mm) Interchange Please review our interchange above in the compatibility table to verify proper fitment of your vehicle. ...

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