Walker 250-25131 Oxygen Sensor - Upstream

Overview of Walker 250-25131 Oxygen Sensor for BMW Models

The Walker 250-25131 oxygen sensor is designed specifically for select BMW vehicles, including the 230i, 330i, 430i, 530i, and X3 among others. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the engine management system.

• Heated oxygen sensor type for faster response times
• Specific fit for various BMW models including 230i, 330i, 430i, 530i, and X3
• Wiring harness length of 20.2 inches for proper installation
• Five-wire configuration with 20 gauge wire for reliable signal transmission
• Female connector with 18mm thread diameter for secure fitment
• Overall sensor length of 23.74 inches

Detailed Features and Specifications

This Walker Products OE oxygen sensor (part number 250-25131) is engineered with a heated sensor element to reduce warm-up time, improving emissions control immediately after engine start. The sensor features a 20.2-inch wiring harness and five wires with 20 gauge measurement, ensuring compatibility with the vehicle’s electrical system. The female connector and 18mm thread diameter provide a precise and secure fit, minimizing installation issues. The overall length of 23.74 inches allows for proper placement within the exhaust system.

Walker Products OE Line Information

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM specifications. This oxygen sensor is part of that line, ensuring it matches the performance and durability standards expected by BMW manufacturers. Using a Walker Products OE sensor helps maintain factory-level emissions control and engine efficiency.

Applications and Common Issues Addressed

• Compatible with BMW 230i, 230i xDrive, 330e, 330i, 330i GT xDrive, 330i xDrive, 430i, 430i Gran Coupe, 430i xDrive, 430i xDrive Gran Coupe, 530e, 530e xDrive, 530i, 530i xDrive, 740e xDrive, X3, and X4 models
• Helps resolve rough idling caused by incorrect air-fuel mixture readings
• Addresses increased emissions and failed emissions tests
• Improves fuel economy by providing accurate oxygen level data
• Reduces engine hesitation and stalling related to faulty sensors

Installation Notes and Tips

When installing the Walker 250-25131 oxygen sensor, ensure the vehicle is cool to avoid burns. Use an oxygen sensor socket or appropriate wrench to remove the old sensor carefully. Verify the connector type matches the vehicle harness (female connector) and confirm the thread diameter is 18mm for proper fit. Avoid damaging the wiring harness during installation and route wires away from hot exhaust components.

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This part is backed by Walker’s quality assurance protocols, providing confidence in its fitment and function. Please refer to Walker’s official warranty terms for specific coverage details.