Denso 234-4971 Oxygen Sensor - Downstream

Overview of the Denso OE Style Oxygen Sensor 234-4971

The Denso OE Style Oxygen Sensor 234-4971 is designed specifically for select BMW and Mini models, providing precise emissions control and engine performance monitoring. This heated oxygen sensor features a threaded mounting type and a 24.25-inch wiring harness, ensuring a direct fit and reliable operation.

• Heated oxygen sensor for accurate emissions feedback
• Specific fit for BMW and Mini vehicles
• 24.25-inch wiring harness length for proper installation
• Threaded mounting with 0.708-inch thread diameter
• Four-wire design with male connector for secure connection

Detailed Features and Specifications

The Denso OE Style 234-4971 oxygen sensor is engineered with a heated sensor element to provide faster response times and improved fuel efficiency. Its four-wire configuration supports both the sensor signal and heater circuit, essential for maintaining optimal sensor temperature. The 0.708-inch threaded mounting ensures compatibility with the exhaust system of specific BMW and Mini models, including the 335i, 435i, 640i series, and various Cooper and X series vehicles. The 24.25-inch wiring harness length allows for proper routing and connection without modification.

About the OE Style Product Line

The OE Style line from Denso focuses on delivering parts that meet original equipment specifications for fit, form, and function. This oxygen sensor is part of that line, ensuring it matches the performance and durability standards expected by BMW and Mini manufacturers. The OE Style designation indicates a direct replacement part designed to integrate seamlessly with the vehicle's existing systems.

Applications and Common Issues Addressed

• Restores accurate air-fuel ratio readings for engine control units
• Resolves check engine light triggers related to oxygen sensor faults
• Improves fuel economy by providing precise emissions data
• Reduces exhaust emissions by maintaining proper combustion
• Eliminates rough idling or poor engine performance caused by faulty sensors

Installation Notes and Tips

When installing the Denso 234-4971 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct socket size for the 0.708-inch threaded sensor to prevent damage. Verify the four-wire connector is securely attached and routed away from heat sources or moving parts. This sensor is a specific fit for BMW and Mini models listed, so confirm compatibility before installation.

Quality Assurance and Warranty

Denso manufactures the OE Style 234-4971 oxygen sensor to meet strict quality standards, ensuring reliable performance and durability. While specific warranty details may vary, Denso parts typically come with a limited warranty covering defects in materials and workmanship. Refer to the product documentation or supplier for exact warranty terms.