NTK 24331 Air / Fuel Ratio Sensor - Upstream, Upstream Left or Upstream Right

Direct Fit Air/Fuel Ratio Sensor for OE Applications

NTK Part Number 24331 is a direct fit heated air/fuel ratio sensor built for specific Mercedes-Benz, BMW, Volkswagen, Mini, Audi, and Rolls-Royce applications. It is designed for upstream use where accurate exhaust feedback is critical to fuel control and emissions performance.

Key Features

• Direct Fit 5-Wire A/F Sensor for specific vehicle applications
• Heated sensor design for faster operating temperature
• 26.5 in. wiring harness length
• 18.000 mm thread diameter with 0.38 in. thread length
• Specific fit design for OE-style replacement
• No mounting bracket included

Product Line Details

NTK Direct Fit 5-Wire A/F Sensor products are built for import and domestic coverage with OE application focus. As part of the NGK family, NTK uses controlled ceramic manufacturing and extensive testing to deliver fit, form, and function that align with original equipment requirements.

Detailed Description

This NTK air/fuel ratio sensor is engineered for precise upstream exhaust monitoring on select Mercedes-Benz, BMW, Volkswagen, Mini, Audi, and Rolls-Royce vehicles. It supports accurate feedback to the engine control system, helping maintain proper air-fuel balance and emissions system operation. Part number 24331 is a direct fit replacement for applications that call for a 5-wire heated sensor with OE-equivalent design.

Fits 2018-2020 Mercedes-Benz GLC350e, Upstream. Fits 2017-2020 Mercedes-Benz SL450, Upstream Right. Fits 2017-2020 Mercedes-Benz SL550, Upstream Right. Fits 2013-2020 Mercedes-Benz SL550, Upstream Left. Fits 2017-2020 Mercedes-Benz SLC300, Upstream. Fits 2017-2020 Mercedes-Benz SLC43 AMG, Upstream Right. Fits 2017-2019 Mercedes-Benz E300, Upstream. Fits 2016-2019 Mercedes-Benz GLC300, Upstream. Fits 2013-2019 Mercedes-Benz SL63 AMG, Upstream Left. Fits 2015-2018 Mercedes-Benz C300, Upstream. Fits 2016-2018 Mercedes-Benz C350e, Upstream. Fits 2009-2017 Volkswagen CC, Upstream Left. Fits 2007-2012 Mini Cooper, Upstream. Fits 2008-2011 Rolls-Royce Phantom, Upstream Right and Upstream Left. Fits 2007-2010 BMW 550i, Upstream Right and Upstream Left. Fits 2006-2010 BMW 650i, Upstream Right and Upstream Left. Fits 2006-2010 BMW M5, Upstream Right and Upstream Left. Fits 2006-2010 BMW M6, Upstream Right and Upstream Left. Fits 2007-2010 BMW X5, Upstream Right. Fits 2006-2008 BMW 750i, Upstream Right and Upstream Left. Fits 2006-2008 BMW 750Li, Upstream Right and Upstream Left. Fits 2007-2008 BMW 760Li, Upstream Right and Upstream Left. Fits 2007 Audi S6, Upstream. Fits 2007 Rolls-Royce Phantom, Upstream Right and Upstream Left. Fits 2006 BMW 550i, Upstream Right and Upstream Left.

This part cross-references Bosch 17028 and DENSO Auto Parts 234-5136 for the same application.

What It Helps Address

• Fault codes related to upstream air/fuel ratio sensor performance
• Rough idle caused by inaccurate exhaust oxygen feedback
• Fuel trim issues from delayed or incorrect sensor response
• Emissions test failures tied to sensor degradation
• Driveability concerns on OE-style replacement applications

Installation Notes and Quality Assurance

Verify the connector style, wire count, thread diameter, and sensor position before installation. This sensor is specific fit and intended for the listed upstream applications, including Bank 1 Sensor 1 references where noted. Use the vehicle’s service information to confirm left- or right-side placement on models with side-specific fitment.

NTK manufactures oxygen and air/fuel ratio sensors with OE-focused engineering and manufacturing controls, and each sensor is extensively tested during production to help meet or exceed original equipment specifications.