Walker 250-25162 Oxygen Sensor - Upstream

Overview of Walker OE Base Sensor 250-25162

The Walker OE Base Sensor 250-25162 is a heated wide-band oxygen sensor designed specifically for select BMW models. Engineered to provide accurate air-fuel mixture readings, this sensor supports optimal engine performance and emission control.

• Heated wide-band oxygen sensor for precise measurement
• Specific fit for BMW 2 Series, 3 Series, 4 Series, 5 Series, X Series, and Z4 models
• 5-wire design with spade terminal type and female rectangular connector
• Thread size M18 x 1.5 with 22mm wrench size for installation
• OE Base Sensor product line ensuring quality and compatibility

Detailed Product Features and Specifications

This Walker oxygen sensor features a heated element to ensure rapid sensor activation and accurate readings under various operating conditions. The wide-band sensor type allows for a broader range of air-fuel ratio detection compared to narrow-band sensors, improving engine management system feedback. It includes five wires with male terminals and a female rectangular connector, designed for a specific fit rather than universal application. The sensor’s thread size is M18 x 1.5, compatible with the specified BMW models, and requires a 22mm wrench for installation.

The OE Base Sensor line by Walker focuses on providing original equipment quality replacement parts that meet or exceed factory specifications. This ensures reliable performance and durability for emission control systems.

Compatible BMW Models and Applications

• BMW 228i and 228i xDrive
• BMW 320i and 320i xDrive
• BMW 328i, 328i GT xDrive, and 328i xDrive
• BMW 428i, 428i Gran Coupe, 428i xDrive, and 428i xDrive Gran Coupe
• BMW 528i and 528i xDrive
• BMW X1, X3, X4, X5
• BMW Z4

Common Issues Addressed by Walker Oxygen Sensor 250-25162

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor malfunction
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor accuracy

Installation Notes and Tips

Installation requires a 22mm wrench to remove and replace the sensor. Ensure the sensor’s thread size M18 x 1.5 matches the vehicle’s exhaust port. The specific fit design means this sensor is intended only for the listed BMW models. Handle the sensor carefully to avoid damage to the wiring or connector. It is recommended to disconnect the battery before installation to prevent electrical shorts.

Quality Assurance and Warranty

Walker’s OE Base Sensor line is manufactured to meet original equipment standards, providing reliable performance and durability. While specific warranty details are not provided here, Walker products typically come with a limited warranty against defects in materials and workmanship. Refer to the product packaging or manufacturer documentation for exact warranty terms.