Denso 234-4877 Oxygen Sensor - Downstream or Downstream Right

Overview of the Denso OE Style Oxygen Sensor 234-4877

The Denso OE Style Oxygen Sensor 234-4877 is designed specifically for select BMW models, including the 323i, 525i, 525xi, 530i, 530xi, 550i, 650i, 750i, and 750Li. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases precisely.

• Heated sensor type for faster response times
• Specific fit for BMW 323i, 525i, 525xi, 530i, 530xi, 550i, 650i, 750i, and 750Li
• Threaded mounting type with 0.708 inch thread diameter
• Four-wire design with female connector for secure connection
• Wiring harness length of 17.13 inches for proper installation

Detailed Features and Specifications

This oxygen sensor from Denso’s OE Style line is engineered to meet original equipment specifications, providing reliable emissions feedback to the engine control unit. The heated sensor element allows the sensor to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The four-wire configuration supports both the sensor signal and heater circuit, while the female connector ensures compatibility with factory wiring harnesses. The threaded mounting type with a 0.708 inch diameter allows for secure and precise installation in the exhaust system.

About the Denso OE Style Product Line

The OE Style product line by Denso focuses on delivering parts that match original equipment quality and fitment. This line is designed to provide a direct replacement for factory components, ensuring compatibility and performance without modification. The 234-4877 oxygen sensor exemplifies this approach by offering a specific fit for various BMW models, maintaining the integrity of the vehicle’s emissions system.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper air-fuel mixture control
• Helps resolve check engine light codes related to oxygen sensor failure
• Improves fuel economy by providing precise emissions data
• Reduces harmful exhaust emissions by maintaining sensor functionality
• Prevents rough idling and engine performance issues caused by faulty sensors

Installation Notes and Tips

When installing the Denso 234-4877 oxygen sensor, ensure the vehicle is compatible with the specific fitment list, including BMW 323i, 525i, 525xi, 530i, 530xi, 550i, 650i, 750i, and 750Li models. Use proper tools to avoid damaging the threaded mounting. Verify the wiring harness length of 17.13 inches is sufficient for your application and confirm the female connector matches the vehicle’s harness. It is recommended to replace the sensor when the engine and exhaust system are cool to prevent injury.

Quality Assurance and Warranty

Denso oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure durability and performance. The OE Style 234-4877 sensor is built to provide consistent operation under demanding conditions. Warranty coverage details should be confirmed with the original parts provider or vehicle manufacturer.