NTK 25158 Oxygen Sensor - Upstream Left or Upstream Right

Overview of NTK Direct Fit Oxygen Sensor 25158

The NTK Direct Fit Oxygen Sensor 25158 is designed specifically for select Hyundai and Kia models, including the Amanti, Santa Fe, Sedona, Sorento, and XG350. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.

• Heated sensor type for faster response times
• Specific fit for Hyundai and Kia vehicles
• Threaded mounting type with 18mm thread diameter
• 16.75-inch wiring harness length for direct installation
• Four-wire configuration for reliable signal transmission

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is engineered to provide exact replacement sensors that match OEM specifications. These sensors are designed for straightforward installation without the need for modifications, ensuring compatibility and reliable performance. The 25158 part number belongs to this line, offering a precise fit and function for the specified Hyundai and Kia models.

Detailed Product Description

This NTK oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving emission control efficiency shortly after engine start. The sensor’s 18mm threaded mounting type ensures secure attachment in the exhaust system. With a 16.75-inch wiring harness and four wires, it connects seamlessly to the vehicle’s electrical system, maintaining signal integrity. The specific fitment for Hyundai Amanti, Santa Fe, Kia Sedona, Sorento, and XG350 models means it meets the exact requirements for these vehicles, supporting proper engine management and emission standards.

Common Issues Addressed by This Oxygen Sensor

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture data
• Increased emissions and failed emissions tests
• Engine performance problems such as rough idling or hesitation
• Delayed sensor response affecting catalytic converter efficiency

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate tools for the 18mm threaded sensor to prevent damage
• Verify wiring harness length and connector compatibility before installation
• Do not over-tighten the sensor to avoid thread damage
• Clear any diagnostic trouble codes after installation to reset the system

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. The Direct Fit Oxygen Sensor 25158 undergoes rigorous testing to comply with OEM specifications. Warranty coverage details should be confirmed with the supplier or manufacturer, as they may vary by region.