NTK 25199 Oxygen Sensor - Downstream

Overview of NTK Direct Fit Oxygen Sensor 25199

The NTK Direct Fit Oxygen Sensor 25199 is engineered for precise emission control in select Hyundai and Kia vehicles. Designed as a heated oxygen sensor with a specific fit, it ensures accurate air-fuel mixture readings for optimal engine performance and reduced emissions.

• Heated oxygen sensor type for faster response times
• Specific fit for Hyundai and Kia models including Forte, Sonata, and Santa Fe
• Threaded mounting type with 18mm thread diameter
• Four-wire configuration for reliable electrical connections
• 23.25-inch wiring harness length for proper installation

Details on the Direct Fit Oxygen Sensor Product Line

The NTK Direct Fit Oxygen Sensor line is designed to provide exact replacement sensors that match OEM specifications. This product line focuses on direct compatibility, eliminating the need for modifications during installation. The 25199 sensor maintains the integrity of the vehicle’s emission system by delivering consistent and accurate oxygen level readings.

Technical Description and Compatibility

This oxygen sensor features a heated element to quickly reach operating temperature, improving sensor response and engine efficiency. The 18mm threaded mounting ensures secure attachment in the exhaust system. With four wires, the sensor supports both the heating element and signal transmission. The 23.25-inch wiring harness length accommodates factory routing without strain or extension. Compatible with Hyundai models such as Forte, Forte5, Forte Koup, Genesis Coupe, Sonata, and Santa Fe, as well as Kia models including Optima, Rondo, Sorento, Sportage, and Tucson, this sensor is designed for specific fitment to maintain vehicle performance.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel economy
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce harmful emissions by ensuring proper catalytic converter function
• Corrects rough idling or engine hesitation caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

Installation requires removal of the old oxygen sensor and threading the NTK 25199 sensor into the exhaust port. The 18mm threaded design matches factory specifications, and the 23.25-inch wiring harness length allows for direct connection without splicing. It is recommended to use an anti-seize compound on the threads to facilitate future removal. Ensure the vehicle is cool before installation to avoid burns and verify sensor orientation for proper function.

Quality Assurance and Warranty

NTK oxygen sensors undergo rigorous testing to meet OEM standards for durability and performance. The Direct Fit Oxygen Sensor 25199 is manufactured to provide reliable operation under normal driving conditions. Warranty coverage details should be confirmed with the product documentation or supplier, as they may vary by region.