Walker 250-25161 Oxygen Sensor - Upstream or Upstream Right

Overview of Walker OE Base Sensor Oxygen Sensor 250-25161

The Walker OE Base Sensor 250-25161 is a heated wide-band oxygen sensor designed specifically for select Cadillac and Subaru models. Engineered to provide accurate air-fuel ratio readings, this sensor supports optimal engine performance and emission control.

• Heated wide-band oxygen sensor for precise measurement
• Specific fit for Cadillac XLR and Subaru Forester, Impreza, Legacy, Outback
• Spade terminal type with 6 male terminals and 5 wires
• Rectangular female connector for secure connection
• Thread size M18 - 1.5 with 22mm wrench size for installation

Detailed Product Description

This Walker OE Base Sensor oxygen sensor (part number 250-25161) features a heated design that allows it to reach operating temperature quickly, improving sensor response time and reducing emissions during cold starts. The wide-band sensor type provides a broad measurement range of oxygen levels in the exhaust, enabling precise air-fuel mixture adjustments. The sensor includes a spade terminal type with six male terminals and five wires, ensuring reliable electrical connections. Its rectangular female connector shape is designed for a secure and specific fit, compatible with the wiring harnesses of Cadillac XLR and Subaru Forester, Impreza, Legacy, and Outback models. The sensor threads into the exhaust system with an M18 - 1.5 thread size and requires a 22mm wrench for installation.

About the OE Base Sensor Product Line

The Walker OE Base Sensor line focuses on delivering oxygen sensors that meet original equipment specifications for fit, form, and function. This product line emphasizes precise sensor technology and durable construction to maintain emission control system integrity. The 250-25161 sensor is part of this line, ensuring compatibility and performance aligned with factory standards for the specified Cadillac and Subaru vehicles.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper engine management
• Helps resolve rough idling and poor fuel economy
• Reduces emissions by maintaining correct air-fuel ratios
• Prevents check engine light triggers related to oxygen sensor faults
• Improves overall engine performance and drivability

Installation Notes and Tips

When installing the Walker OE Base Sensor 250-25161, ensure the vehicle is compatible with this specific fit sensor for Cadillac XLR or Subaru Forester, Impreza, Legacy, and Outback models. Use a 22mm wrench to remove the old sensor and install the new one with the M18 - 1.5 thread size. Verify the connector's rectangular female shape matches the vehicle harness and that the spade terminals align correctly. Avoid over-tightening to prevent damage to the sensor or exhaust threads.

Quality Assurance and Warranty

Walker OE Base Sensors are manufactured to meet or exceed OEM standards for durability and performance. While specific warranty details are not provided here, Walker products typically come with a limited warranty covering defects in materials and workmanship. This ensures reliable operation and peace of mind when replacing oxygen sensors on Cadillac and Subaru vehicles.