Walker 350-35055 Oxygen Sensor

Walker Oxygen Sensor for Saturn and Cadillac

Walker Products 350-35055 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Saturn and Cadillac applications. It is engineered to provide the ECU with the exhaust feedback needed for accurate fuel control, emissions monitoring, and fault detection.

For Saturn L300, LW300, LS2, and LW2 models, as well as Cadillac Catera applications, this Walker oxygen sensor is positioned for upstream service at the front, rear, left, or right locations shown in the fitment data. The 350-35055 part number is designed around the vehicle’s original sensor location and connector style for direct replacement service.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the listed Saturn and Cadillac applications
• 5-wire configuration with female connector
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon connector shape
• 19.8 in. wiring harness length and 23.35 in. overall length
• Walker Products Aftermarket engine management sensor line

Product Line Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors developed as OE replacement parts for a wide range of vehicles. The line is built around application-specific fitment, connector configuration, and ECU feedback requirements, making it a practical choice when replacing a failed upstream oxygen sensor on Saturn and Cadillac platforms.

Detailed Description

Walker Products 350-35055 is an upstream oxygen sensor for 1999-2005 Cadillac Catera and 2000-2005 Saturn L-series applications listed below. It is intended for vehicles that use a heated, threaded sensor with a 5-wire electrical design and a female radiused polygon connector. When the original sensor begins to fail, the ECU may store fault codes and the vehicle can show poor running behavior, higher fuel use, increased exhaust emissions, or a malfunction indicator light.

This part number is a direct-fit replacement for the specified positions, including Saturn L300 upstream front and rear, Saturn LW300 upstream front and rear, Saturn LS2 upstream front and rear, Saturn LW2 upstream front and rear, and Cadillac Catera upstream left and right. Walker Products 350-35055 is built to match the application-specific sensor location and signal requirements used by the vehicle’s engine management system.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Rough engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from improper air-fuel correction
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes and Tips

Confirm the vehicle’s exact year, model, and sensor position before ordering. For best results, inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation. Because this is a threaded heated oxygen sensor, proper removal and installation tools should be used to avoid damage to the exhaust bung or sensor body.

Compatible fitment includes 2001-2005 Saturn L300 upstream rear, 2001-2005 Saturn L300 upstream front, 2001-2003 Saturn LW300 upstream rear, 2001-2003 Saturn LW300 upstream front, 1999-2001 Cadillac Catera upstream right, 1999-2001 Cadillac Catera upstream left, 2000 Saturn LS2 upstream rear, 2000 Saturn LS2 upstream front, 2000 Saturn LW2 upstream rear, and 2000 Saturn LW2 upstream front.

Quality Assurance

Walker Products states that its engine management sensors are developed under Automotive ISO9001/TS 16949 certification standards. Since 1946, the brand has supplied engine management and fuel system components for vehicle applications worldwide.