Denso 234-4479 Oxygen Sensor - Downstream

Overview of the Denso OE Style Oxygen Sensor 234-4479

The Denso OE Style Oxygen Sensor 234-4479 is designed specifically for select BMW models, providing precise emissions control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a 26.77-inch wiring harness, ensuring a direct fit and reliable operation.

• Heated oxygen sensor for accurate emissions feedback
• Specific fit for BMW models including 135i, 335i, 528i, 535i, 640i, 740i, and X series
• Threaded mounting with 0.708-inch thread diameter
• 26.77-inch wiring harness length with 4 wires and male connector
• Part number 234-4479 for precise identification and compatibility

Detailed Features and Specifications

This Denso oxygen sensor belongs to the OE Style product line, which focuses on delivering parts that meet original equipment specifications for fit, form, and function. The OE Style line ensures that the sensor integrates seamlessly with the vehicle’s existing systems, maintaining factory performance standards. The 234-4479 sensor is a heated type, which allows it to reach operating temperature quickly for faster and more accurate oxygen level readings.

With a wiring harness length of 26.77 inches and a male connector, this sensor is designed for specific BMW models such as the 135i, 335i GT xDrive, 535i GT xDrive, 640i Gran Coupe, 740Li xDrive, and various ActiveHybrid and X series vehicles. The threaded mounting type with a 0.708-inch diameter ensures secure installation in the exhaust system.

Applications and Common Issues Addressed

• Helps maintain optimal air-fuel mixture for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level data
• Prevents engine performance issues related to faulty oxygen sensors
• Resolves check engine light triggers caused by sensor failure
• Improves fuel economy by enabling proper engine management

Installation Notes and Tips

When installing the Denso 234-4479 oxygen sensor, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Confirm the sensor’s connector matches the vehicle’s male connector and verify the thread diameter for proper fit. It is recommended to apply anti-seize compound on the threads before installation to facilitate future removal.

Quality Assurance and Warranty

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