Denso 234-5030 Air / Fuel Ratio Sensor - Upstream

Denso OE Style Air/Fuel Ratio Sensor 234-5030

Denso 234-5030 is an OE Style heated air/fuel ratio sensor built for specific-fit replacement on select Hyundai and Kia applications. It is engineered for exact fitment and consistent signal response, making it a direct choice for upstream sensor service on vehicles such as the Hyundai Sonata and Kia Optima.

Key Features

• OE Style replacement air/fuel ratio sensor for emission control service
• Heated sensor design for faster operating temperature and stable feedback
• Specific fit for direct replacement on listed applications
• 5-wire configuration with male connector
• Wiring harness length: 25.39
• Thread diameter: 0.711
• Built and tested to OE standards for replacement accuracy

Product Details

Denso 234-5030 is a heated upstream air/fuel ratio sensor designed for precise replacement on select Hyundai Sonata, Kia Forte, Kia Forte Koup, Kia Forte5, Kia Optima, Kia Rondo, and Kia Magentis applications. As part of Denso’s OE Style line, this sensor focuses on first-time fit and factory-style performance, with dimensions and connector design matched for the listed vehicles. This part cross-references Bosch 18052 for the same application.

For buyers searching for a 2011-2013 Hyundai Sonata upstream air fuel ratio sensor or a 2010-2013 Kia Optima upstream oxygen sensor replacement, Denso 234-5030 provides a direct-fit option. It also matches select Kia Forte and Forte Koup upstream applications, including OE Style and excluding California listings where noted.

What It Helps Address

• Check engine light related to upstream air/fuel ratio sensor faults
• Rough idle caused by inaccurate exhaust feedback
• Fuel trim issues from a slow or weak sensor signal
• Emissions test failures tied to sensor performance
• Driveability problems from incorrect air-fuel mixture control

Installation Notes

Verify the connector style, wire count, thread diameter, and upstream location before installation. This sensor is a specific-fit part, so matching the exact year, make, model, and emissions configuration is important. Confirm whether your vehicle is listed as California or non-California application before ordering. For best results, inspect the harness routing and connector condition during replacement.

Quality Assurance

Denso manufactures and tests this OE Style sensor to strict original-equipment standards for replacement accuracy and fit. The 234-5030 is built for direct replacement on the listed Hyundai and Kia applications, with attention to connector, harness, and sensor specifications.