Walker 250-25010 Oxygen Sensor

Walker OE Oxygen Sensor for Saturn and Cadillac

Walker Products OE oxygen sensor Part Number 250-25010 is a specific-fit heated sensor engineered for direct replacement in select Saturn and Cadillac applications. It is built to deliver the diagnostic feedback the ECU expects, helping maintain proper air-fuel control and emissions monitoring.

Compatible With 1999-2005 Saturn L300, LW300, LS2, LW2 and 1999-2001 Cadillac Catera applications, this Walker Products OE sensor is designed around the original mounting position and connector style for a precise service replacement.

Key Features

• Walker Products OE line oxygen sensor for emission control service
• Heated sensor design for faster operating response
• Specific fit application for select Saturn and Cadillac vehicles
• 5-wire configuration with female radiused polygon connector
• Threaded mounting type with 18.0 mm thread diameter
• Wiring harness length: 19.8 in.; overall length: 23.35 in.
• Wire gauge: 20

Product Details

The Walker Products OE 250-25010 oxygen sensor is engineered as an original-equipment-style replacement for vehicles that rely on accurate exhaust feedback to manage fuel delivery and emissions. As a heated oxygen sensor, it helps the ECU monitor exhaust conditions more quickly after startup and during normal operation. This part number is used in upstream positions, including front, rear, left, and right locations depending on the vehicle application. For Saturn L300 and LW300 models, as well as Saturn LS2 and LW2, and Cadillac Catera, the sensor supports the exhaust system’s feedback loop needed for proper engine management.

Walker Products OE focuses on application-specific fitment, so the connector shape, wire count, and threaded mounting design are matched to the listed vehicles. If you are diagnosing a check engine light, poor fuel economy, elevated emissions, or drivability concerns tied to oxygen sensor faults, Part Number 250-25010 is a direct replacement to consider for the confirmed applications. Walker Products 250-25010 is also a practical search term for buyers looking for an OE replacement oxygen sensor for Saturn L300, LW300, LS2, LW2, and Cadillac Catera.

What It Helps Address

• Check engine light related to oxygen sensor circuit faults
• Incorrect air-fuel mixture feedback to the ECU
• Poor fuel economy caused by inaccurate exhaust readings
• Higher exhaust emissions from a failing upstream sensor
• Rough running or inconsistent engine performance

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is listed for upstream front, upstream rear, upstream left, and upstream right locations depending on the vehicle. Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion before installation, and verify the threaded bung condition on the exhaust. Use the vehicle’s service information for torque and routing details, and clear any stored ECU fault codes after replacement.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures this OE line sensor to match the specified application and ECU feedback requirements. The brand is ISO 9001/TS 16949 certified, supporting consistent production and application control for Part Number 250-25010.