Denso 234-4450 Oxygen Sensor - Downstream or Downstream Left

Denso OE Style Oxygen Sensor 234-4450

Denso 234-4450 is an OE Style heated oxygen sensor built for exact replacement and first-time fit. It is engineered for downstream monitoring on select Jaguar and Volvo applications, including Jaguar XK, XKR, XKR-S, XJ, XF, XFR and Volvo XC90, V70, S40, S50, and S60 models.

Key Features

• Heated oxygen sensor with a specific fit for direct replacement
• OE Style design for downstream exhaust sensor locations
• 4-wire configuration with male connector
• Threaded mounting type with 0.708 in. thread diameter
• 25.59 in. wiring harness length for application-specific routing
• Built to Denso OE standards for precise sensor response and fitment
• Aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination

OE Style Design and Fitment

The Denso OE Style line is built to match original equipment dimensions and electrical performance as closely as possible. Part number 234-4450 is a direct-fit downstream oxygen sensor for select Jaguar and Volvo vehicles, including Fits 2010-2015 Jaguar XK, Downstream; Fits 2010-2015 Jaguar XKR, Downstream; Fits 2012-2015 Jaguar XKR-S, Downstream; and Fits 2007-2014 Volvo XC90, Downstream Left. It also covers additional downstream applications on Jaguar XJ, XF, XFR and Volvo V70, S40, V50, and S60 models.

This part cross-references Bosch (e.g., 13528, 13767) for the same application.

What This Oxygen Sensor Helps Address

• Check engine light concerns related to downstream oxygen sensor performance
• Incorrect air-fuel feedback from a worn or contaminated sensor
• Reduced fuel economy caused by inaccurate exhaust oxygen readings
• Slow sensor response after extended heat cycling and exhaust exposure
• Fitment issues from using a universal sensor instead of a vehicle-specific part

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and downstream position before installation. This sensor uses a threaded mounting design and a male connector, so matching the original harness and exhaust bung is important for proper installation. For 2011 Jaguar XF and XFR applications, confirm the chassis/VIN break noted in the fitment data before ordering. For Volvo V70 and S60 applications, confirm the emissions code note listed for your vehicle.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent fit and performance. The sensor’s protective trap layer is designed to help resist contamination that can shorten service life and affect engine operation, fuel efficiency, and emissions control.