Walker 350-35116 Oxygen Sensor - Upstream or Upstream Right

Walker OE Replacement Oxygen Sensor 350-35116

Walker OE Replacement 350-35116 is a specific-fit wide-band oxygen sensor engineered for direct replacement in select applications. It is built for upstream feedback to the ECU, helping maintain accurate air-fuel control and emissions monitoring on vehicles such as the Cadillac XLR and Subaru Forester, Impreza, Legacy, and Outback.

Key Features

• Wide-band oxygen sensor with heated operation
• Specific-fit design for the listed vehicle applications
• 5-wire configuration with spade terminals
• Male connector and male terminal layout
• Threaded mounting with M18 x 1.5 thread size
• Overall length: 560.0 mm
• 22 mm wrench size for service access
• Walker OE Replacement line for application-specific sensor fitment

Product Details

The Walker OE Replacement line focuses on application-matched engine management components, and part number 350-35116 follows that approach with a sensor built for the correct fitment position and diagnostic feedback requirements. This oxygen sensor is used in upstream locations, including the upstream right position on the 2004-2005 Cadillac XLR and the upstream B1S1 position on 2000-2002 Subaru Forester, Impreza, Legacy, and Outback. For buyers searching for a 2005 Cadillac XLR upstream right oxygen sensor or a 2000-2002 Subaru Forester upstream O2 sensor, this part number provides a direct OE-style replacement path.

Walker Products has supplied engine management and fuel system components since 1946 and manufactures sensors to support the feedback signals required by the ECU. Part number 350-35116 is built for the listed applications and is intended to replace the original sensor location without changing the vehicle’s diagnostic strategy. This part cross-references Bosch (e.g., 17014) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate sensor readings
• Higher exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Verify the connector shape, wire count, thread size, and mounting position before installation. Inspect the sensor wiring harness and connector for physical damage, since damaged wiring can shorten service life and affect sensor output. Confirm the vehicle uses the listed upstream position before replacing the original unit.

Quality Assurance

Walker Products manufactures engine management sensors under ISO 9001/TS 16949 quality systems. The OE Replacement line is built for application-specific fitment and diagnostic feedback requirements across the listed Cadillac XLR and Subaru models.