Denso 234-4672 Oxygen Sensor - Upstream

OE-Style Oxygen Sensor for BMW and Land Rover

Denso 234-4672 is a heated, specific-fit oxygen sensor built for upstream applications on select BMW and Land Rover vehicles. It is engineered to match OE-style fitment and electrical requirements for direct replacement service on BMW X3, X5, 3 Series, 5 Series, 7 Series, Z3, Z4, and Range Rover applications.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fit design for direct replacement
• 4-wire configuration with female connector
• Threaded mounting type with 0.708 in. thread diameter
• 13.39 in. wiring harness length
• OE-style construction for upstream exhaust placement

Product Details

The Denso OE Style line is built to match original equipment dimensions and performance expectations, helping ensure the right part and the right fit the first time. This sensor uses Denso’s aluminum oxide trap layer to help protect the ceramic element from silicone and lead contamination, supporting stable sensor operation and long service life. Part number 234-4672 is a practical replacement choice for drivers servicing upstream emissions control on BMW and Land Rover platforms.

This part cross-references Bosch 13477 and NTK 25569 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture readings from a worn upstream sensor
• Reduced fuel economy caused by slow sensor response
• Rough idle or drivability issues tied to emissions feedback
• Failed emissions testing due to sensor degradation

Installation Notes and Fitment

Fits 2004-2006 BMW X3, Upstream. Fits 2000-2006 BMW X5, Upstream. Fits 2001-2005 BMW 320i, Upstream. Fits 2001-2005 BMW 325xi, Upstream. Fits 2001-2005 BMW 330xi, Upstream. Fits 2003-2005 BMW Z4, Upstream. Fits 2003-2005 Land Rover Range Rover, Upstream. Fits 2003 BMW 325Ci, Upstream, To 3/03. Fits 2003 BMW 325i, Upstream, To 3/03. Fits 2003 BMW 330Ci, Upstream, To 3/03. Fits 2003 BMW 330i, Upstream, To 3/03. Fits 2001-2003 BMW 525i, Upstream. Fits 2001-2003 BMW 530i, Upstream. Fits 1997-2003 BMW 540i, Upstream. Fits 2000-2003 BMW M5, Upstream. Fits 2000-2003 BMW Z8, Upstream. Fits 2001-2002 BMW 325Ci, Upstream. Fits 2001-2002 BMW 325i, Upstream. Fits 2001-2002 BMW 330Ci, Upstream. Fits 2001-2002 BMW 330i, Upstream. Fits 1996-2002 BMW Z3, Upstream. Fits 1997-2001 BMW 740i, Upstream. Fits 1996-2001 BMW 740iL, Upstream. Fits 1995-2001 BMW 750iL, Upstream. Fits 2000 BMW 323Ci, Upstream. Fits 1999-2000 BMW 323i, Upstream. Fits 2000 BMW 328Ci, Upstream. Fits 1999-2000 BMW 328i, Upstream. Fits 1999-2000 BMW 528i, Upstream. Fits 1996-1999 BMW 318i, Upstream. Fits 1996-1999 BMW 318is, Upstream. Fits 1996-1999 BMW 318ti, Upstream. Fits 1998 BMW Z3, Upstream, From 9/98. Fits 1996-1997 BMW 840Ci, Upstream. Fits 1995-1997 BMW 850Ci, Upstream.

Before installation, confirm the connector style, wire count, and upstream location match the original sensor. The threaded mounting design is intended for direct replacement in the listed applications, and the harness length should be checked against the vehicle routing path before final installation.

Quality Assurance

Denso manufactures and tests this oxygen sensor to OE standards for consistent replacement quality. The OE-style design, specific fit, and contamination-resistant sensor construction support dependable service on the listed BMW and Land Rover applications.