Denso 234-9151 Air / Fuel Ratio Sensor - Upstream

Denso OE Style Air/Fuel Ratio Sensor

Denso 234-9151 is an OE Style heated air/fuel ratio sensor built for precise replacement and a first-time fit. It is a specific-fit sensor with a 4-wire design and an 18.50-inch wiring harness length for direct replacement on select Volvo and Land Rover applications.

Key Features

• Heated air/fuel ratio sensor for accurate upstream exhaust feedback
• Specific fit design for direct replacement
• 4-wire configuration
• 18.50-inch wiring harness length
• Regular grade type
• OE Style construction for select Volvo S60, V60, XC60, S80, XC70, XC90, V70, and Land Rover LR2 applications

Product Details

Denso 234-9151 is engineered to meet strict OE standards for fit and function. As part of Denso’s OE Style line, this air/fuel ratio sensor is built for vehicles that require an upstream heated sensor with exact replacement dimensions and connector layout. It is used on select Volvo S60, Volvo V60, Volvo XC60, Volvo S80, Volvo XC70, Volvo XC90, Volvo V70, and Land Rover LR2 applications. This part cross-references Bosch 15817 and NTK 25663 for the same application.

Common Replacement Uses

• Restores upstream air/fuel ratio sensor signal accuracy
• Addresses check engine light concerns related to sensor performance
• Helps correct fuel trim and mixture control issues
• Supports proper emissions system operation
• Replaces a worn or failed OE-style sensor on Volvo and Land Rover vehicles

Installation Notes

Install as an upstream sensor in the original OE-style location. Verify the connector, harness length, and engine application before installation, especially on 2015 Volvo S60 chassis-specific listings and 2011-2013 manifold-mounted applications. Confirm the vehicle’s exact year, model, and position against the fitment data before ordering.

Quality Assurance

Denso manufactures and tests this sensor to strict OE standards for consistent replacement quality and exact-fit application coverage.