Denso 234-4798 Oxygen Sensor - Downstream

Denso OE Style Oxygen Sensor 234-4798

Denso 234-4798 is an OE-style heated oxygen sensor built for direct replacement on select Jaguar applications. It is engineered for exact fit and stable signal performance, with a threaded mounting design and a female 4-wire connector for straightforward service on downstream locations.

Key Features

• OE Style replacement oxygen sensor from Denso
• Heated sensor design for downstream exhaust monitoring
• Specific fit for select Jaguar X-Type, S-Type, Super V8, Vanden Plas, XJ8, XJR, XK8, and XKR applications
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 21.26 in. wiring harness length
• Built to OE standards for first-time fit and consistent replacement

Product Details

Denso OE Style oxygen sensors are manufactured and tested to OE-level standards for replacement accuracy and dependable operation. Part number 234-4798 uses a heated sensor element and a specific-fit design to match the original downstream sensor location on compatible Jaguar models. The aluminum oxide trap layer helps protect the ceramic element from silicone and lead contamination, supporting long-term sensor performance and fuel control accuracy. This part cross-references Bosch (e.g., 15626, 15936) for the same application.

Compatible With 2002-2008 Jaguar X-Type, downstream; 2003-2005 Jaguar S-Type, downstream; 2005 Jaguar Super V8, downstream; 1999-2005 Jaguar Vanden Plas, downstream; 1999-2005 Jaguar XJ8, downstream; 1999-2005 Jaguar XJR, downstream; 2000-2005 Jaguar XK8, downstream; and 2000-2005 Jaguar XKR, downstream. Denso 234-4798 is also a direct-fit option for drivers searching for a downstream oxygen sensor for Jaguar X-Type or a replacement oxygen sensor for Jaguar XJ8 and XKR models.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn downstream sensor
• Reduced fuel economy caused by inaccurate exhaust feedback
• Slow or inconsistent sensor response during closed-loop operation
• Exhaust monitoring faults on compatible Jaguar applications

Installation Notes and Tips

Verify the connector style, wire count, thread diameter, and downstream position before installation. Inspect the harness routing and exhaust threads for damage, and confirm the sensor is installed in the correct downstream location for the vehicle. Because this is a specific-fit sensor, matching the original application details is important for proper operation.

Quality Assurance

Denso manufactures this oxygen sensor to strict OE standards and tests it for replacement accuracy and fit. The OE-style construction and contamination-resistant trap layer are intended to support reliable service life on the listed Jaguar applications.