Walker 250-24991 Oxygen Sensor - Downstream

Overview of Walker Products OE Oxygen Sensor 250-24991

The Walker Products OE Oxygen Sensor 250-24991 is designed specifically for select BMW models, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.

• Heated oxygen sensor with 4 wires for accurate readings
• Specific fit for BMW models including 135i, 335i, 535i, 640i, 740i, and various xDrive and Gran Coupe variants
• 27.09-inch wiring harness length and 30.63-inch overall length for proper reach
• 22 gauge wire measurement for durability and signal integrity
• Thread diameter of 18.0 mm with threaded mounting for reliable attachment
• Radiused polygon male connector for secure electrical connection

Detailed Product Description

This oxygen sensor from Walker Products OE is engineered to meet the exact specifications required by BMW vehicles such as the 135i, 335i GT xDrive, 535i GT xDrive, 640i Gran Coupe, 740Li xDrive, and ActiveHybrid series. The sensor type is heated, which allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 4-wire design supports both the sensor signal and heater circuit, ensuring consistent performance. The wiring harness length of 27.09 inches and overall length of 30.63 inches provide ample reach for installation in the designated mounting locations. The connector features a radiused polygon shape with a male gender, designed to fit securely with the vehicle’s wiring harness. The threaded mounting type with an 18.0 mm thread diameter ensures a tight and stable fit in the exhaust system.

The Walker Products OE line focuses on delivering original equipment quality parts that meet or exceed OEM standards. This oxygen sensor is part of that line, offering a direct replacement solution that maintains the integrity of the vehicle’s emission control system.

Common Applications and Issues Addressed

• Restores accurate oxygen level readings for proper air-fuel mixture control
• Helps resolve rough idling and engine hesitation caused by faulty sensors
• Reduces increased emissions and potential failed emissions tests
• Prevents check engine light triggers related to oxygen sensor faults
• Improves fuel economy by ensuring efficient combustion

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate oxygen sensor socket or wrench for threaded removal
• Verify connector type matches vehicle harness before installation
• Apply anti-seize compound on threads if not pre-coated to ease future removal
• Check for proper wiring connections and secure fit of the radiused polygon connector

Quality Assurance and Warranty

Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship. Using this sensor helps maintain compliance with emission regulations and supports the longevity of your BMW’s emission control system.