Denso 234-5742 Air / Fuel Ratio Sensor - Upstream or Upstream Right

Denso OE-Style Air/Fuel Ratio Sensor

Denso 234-5742 is an OE-style wide-band air/fuel ratio sensor built for precise replacement on select BMW applications. It is engineered for a specific fit, with a 5-wire male connector and an 18.50-inch wiring harness length for direct replacement service.

For BMW owners searching for an upstream right air/fuel ratio sensor or an OE-style replacement for upstream BMW sensor applications, this Denso part number 234-5742 is built to match the original configuration and connection style.

Key Features

• Wide-band air/fuel ratio sensor for accurate exhaust feedback
• Specific-fit design for direct replacement on listed BMW vehicles
• 5-wire construction with male connector
• 18.50-inch wiring harness length
• Standard replacement grade for OE-style service
• Manufactured and tested to OE standards for fit and function

Product Details

Denso’s Air/Fuel Ratio Sensor line is built around OE-style replacement requirements, with precision construction intended to match the original sensor layout and electrical connection. Part number 234-5742 is a wide-band sensor used in upstream positions on supported BMW models, including BMW M2, BMW M4, BMW 640i, BMW X5, and other listed applications. The design supports accurate air-fuel monitoring for engine management systems that rely on precise sensor input.

This part cross-references Bosch 17015 and Gates 24364 for the same application. It also cross-references BMW OE numbers 11787596908 and 11787848483.

What This Sensor Helps Address

• Check engine light related to air/fuel ratio sensor performance
• Rough idle caused by incorrect exhaust mixture feedback
• Fuel trim faults from inaccurate upstream sensor readings
• Reduced drivability from a failing wide-band sensor
• OE connector or harness mismatch during replacement

Installation Notes and Fitment

Compatible with select BMW models in upstream positions only. Fits 2019-2021 BMW M2, Upstream Right; 2015-2020 BMW M4, Upstream Right; 2015-2019 BMW 640i Gran Coupe, Upstream; 2014-2019 BMW 640i xDrive Gran Coupe, Upstream; 2011-2019 BMW X6, Upstream; 2014-2018 BMW 640i, Upstream; 2014-2018 BMW 640i xDrive, Upstream; 2016-2018 BMW M2, Upstream; 2015-2018 BMW M3, Upstream Right; 2016-2018 BMW X4, Upstream; 2011-2018 BMW X5, Upstream; 2010-2017 BMW 535i GT, Upstream; 2011-2017 BMW 535i GT xDrive, Upstream; 2014-2016 BMW 435i, Upstream; 2015-2016 BMW 435i Gran Coupe, Upstream; 2014-2016 BMW 435i xDrive, Upstream; 2015-2016 BMW 435i xDrive Gran Coupe, Upstream; 2011-2016 BMW 535i, Upstream; 2014-2016 BMW 535i xDrive, Upstream; 2012-2016 BMW ActiveHybrid 5, Upstream; 2014-2016 BMW M235i, Upstream; 2015-2016 BMW M235i xDrive, Upstream; 2014 BMW 335i, Upstream; 2014 BMW 335i xDrive, Upstream; 2014 BMW ActiveHybrid 3, Upstream.

Verify the original sensor position and connector style before installation. This Denso 234-5742 is a direct-fit replacement for supported BMW upstream applications and is intended to match OE-style mounting and electrical requirements.

Quality Assurance

Denso manufactures and tests this sensor to strict OE standards, with precision-built components intended to deliver the correct fit and replacement performance for the listed BMW applications.