Denso 234-4266 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

OE-Style Oxygen Sensor for Land Rover

This Denso OE Style oxygen sensor is built for direct replacement on select Land Rover applications, including Range Rover, LR3, and Range Rover Sport models. It uses a heated, threaded design with a specific-fit connector layout for accurate installation and dependable exhaust monitoring.

Key Features

• OE Style replacement from Denso for precise fit and function
• Heated oxygen sensor design for faster operating response
• Specific fit application with a male connector
• 4-wire configuration for the correct sensor circuit layout
• Threaded mounting type with 0.708 in. thread diameter
• 16.61 in. wiring harness length for vehicle-specific routing
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

Detailed Description

Denso part number 234-4266 is engineered as an OE-style oxygen sensor for select Land Rover exhaust systems. It is manufactured and tested to strict original-equipment standards, with precision-built dimensions intended to deliver a first-time fit on the listed downstream positions. This part number 234-4266 is a direct replacement choice for drivers servicing emissions and fuel-control feedback on Range Rover, LR3, and Range Rover Sport models.

The Denso OE Style line focuses on exact replacement geometry and sensor performance. Its heated design supports quicker sensor operation, while the protective aluminum oxide trap layer helps shield the sensing element from contamination that can affect engine performance and fuel economy. This part cross-references Bosch (e.g., 13116) for the same application.

Vehicle Fitment

• Fits 2007-2009 Land Rover Range Rover, downstream; exc. North American Vehicle; OE Style
• Fits 2006 Land Rover Range Rover, downstream; OE Style
• Fits 2006 Land Rover Range Rover Sport, downstream right; OE Style
• Fits 2006 Land Rover Range Rover Sport, downstream left; OE Style
• Fits 2005-2006 Land Rover LR3, downstream left; OE Style

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn downstream sensor
• Reduced fuel efficiency caused by inaccurate exhaust readings
• Slow sensor response after contamination or age-related wear
• Emissions monitoring faults on supported Land Rover applications

Installation Notes and Tips

Verify the downstream position and side before ordering, especially on Range Rover Sport applications where left and right locations differ. Confirm the connector style, wire count, and thread diameter match the original sensor. Use the vehicle’s existing routing path for the 16.61 in. harness length and inspect the exhaust bung threads before installation.

Quality Assurance

Denso manufactures this oxygen sensor to strict OE standards and tests it for replacement accuracy and fit consistency. The OE Style product line is designed to deliver the correct part and the correct fit for the listed Land Rover applications.