NTK 24304 Air / Fuel Ratio Sensor - Upstream

NTK Direct Fit A/F Sensor 24304

NTK 24304 is a direct fit 5-wire air/fuel ratio sensor for upstream applications on select Hyundai and Kia models. It is built for specific-fit replacement where accurate air/fuel feedback is needed for engine management and emissions control.

Key Features

• Direct fit 5-wire air/fuel ratio sensor for upstream placement
• Heated sensor design for faster operating temperature
• Specific fit for select Hyundai Elantra, Kia Spectra, and Kia Spectra5 applications
• 18.0 in. wiring harness length
• 18.000 mm thread diameter with 0.38 in. thread length
• No mounting bracket included

Product Line Details

NTK Direct Fit 5-Wire A/F Sensor products are built around OE-style application coverage and sensor technology. As part of the NGK family, NTK focuses on ceramic-based sensor manufacturing and OE-level fit, form, and function for import and domestic vehicles. Part number 24304 follows that approach for direct replacement service on listed upstream applications.

Detailed Description

NTK 24304 is an upstream air/fuel ratio sensor designed for select 2003-2009 Hyundai and Kia vehicles, including 2003 Hyundai Elantra, 2004-2006 Hyundai Elantra, 2004-2006 Kia Spectra, and 2005-2009 Kia Spectra5. This sensor supports precise exhaust feedback for the engine control system and is a direct fit replacement for the original sensor location. This part cross-references Bosch 15646 for the same application.

What It Helps Address

• Check engine light related to upstream oxygen or air/fuel sensor faults
• Rough idle caused by incorrect air/fuel feedback
• Fuel trim issues from a slow or inaccurate sensor signal
• Emissions test failures tied to sensor performance
• Driveability problems on Hyundai Elantra, Kia Spectra, and Kia Spectra5 models

Installation Notes and Tips

• Verify the connector, wire count, and upstream location before installation.
• Confirm the vehicle application by year, make, model, and engine configuration.
• Inspect the exhaust bung threads and sensor harness routing during replacement.
• Use the listed direct-fit application data for 2003-2009 Hyundai and Kia coverage.

Quality Assurance

NTK manufactures oxygen and air/fuel sensors with OE-focused testing during production to support fit, function, and reliability that meet or exceed original equipment specifications.