Denso 234-8012 Oxygen Sensor - Downstream

Reliable Oxygen Sensor for BMW Models

The Denso OE Style 234-8012 oxygen sensor is designed specifically for select BMW vehicles, including the 340i, 440i, 540i, and X3 models. This heated oxygen sensor ensures accurate emissions monitoring and optimal engine performance by providing precise air-fuel mixture data.

• Heated sensor type for faster activation and improved efficiency
• Specific fit for BMW models such as 340i xDrive, 440i Gran Coupe, and 740i xDrive
• Threaded mounting type with 0.705 thread diameter for secure installation
• Four-wire design with a male connector for reliable electrical connection
• Wiring harness length of 20.71 inches to accommodate factory routing

About the Denso OE Style Product Line

The OE Style line from Denso offers oxygen sensors engineered to meet original equipment specifications. This ensures compatibility and performance that align with factory standards. The 234-8012 sensor maintains the quality and fitment expected from OEM parts, making it a suitable replacement for specific BMW models requiring precise emission control components.

Product Details and Specifications

The Denso 234-8012 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, reducing emissions during cold starts. Its four-wire configuration supports both the sensor signal and heater circuit, enhancing responsiveness and durability. The threaded mounting type with a 0.705-inch diameter ensures a secure fit in the exhaust system. With a wiring harness length of 20.71 inches and a male connector, this sensor is designed for direct replacement without modification.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for BMW 340i and 440i models
• Helps resolve check engine light triggers related to oxygen sensor faults
• Improves fuel efficiency by providing precise emissions data
• Reduces exhaust emissions by maintaining proper combustion control
• Prevents rough idling and engine performance issues caused by faulty sensors

Installation Notes and Tips

Ensure the vehicle is cool before removing the old oxygen sensor to avoid burns. Use a proper oxygen sensor socket for removal and installation to prevent damage. Verify the connector gender matches the vehicle harness for a secure electrical connection. Follow torque specifications for the 0.705-inch threaded mounting to avoid leaks or sensor damage.

Quality Assurance and Warranty

Denso OE Style oxygen sensors are manufactured to meet strict quality standards and original equipment specifications. The 234-8012 part undergoes rigorous testing to ensure durability and reliable performance in emission control systems. Warranty coverage details should be confirmed with the parts provider or manufacturer.