NTK 25079 Oxygen Sensor - Downstream or Downstream Left

Overview of NTK Direct Fit Oxygen Sensor 25079

The NTK Direct Fit Oxygen Sensor 25079 is engineered specifically for Audi A4, A4 Quattro, A6, and A6 Quattro models. Designed to provide accurate air-fuel mixture readings, this heated oxygen sensor ensures optimal engine performance and emission control.

• Heated sensor type for faster response times
• Specific fit for select Audi models
• 23.25-inch wiring harness length for precise installation
• Four-wire configuration for reliable signal transmission
• 18mm threaded mounting for secure attachment

Detailed Product Features and Specifications

This oxygen sensor features a heated element that allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. The 23.25-inch wiring harness length provides ample reach for clean and secure connections within the engine bay. With a four-wire design, the sensor supports both the heater circuit and signal output, ensuring accurate data delivery to the vehicle’s engine control unit (ECU). The 18mm threaded mounting type guarantees a secure and leak-free fitment in the exhaust system. This sensor is a specific fit for Audi A4, A4 Quattro, A6, and A6 Quattro models, ensuring compatibility and proper function.

About the NTK Direct Fit Oxygen Sensor Line

The Direct Fit Oxygen Sensor line by NTK is designed to match OEM specifications closely, providing a direct replacement without the need for modifications. This product line focuses on delivering precise fitment and reliable performance for emission control systems. The 25079 part number is part of this line, offering a straightforward installation process and dependable operation for compatible Audi vehicles.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved engine efficiency
• Helps resolve rough idling and poor acceleration caused by faulty sensors
• Reduces increased emissions and failed emissions tests
• Prevents check engine light triggers related to oxygen sensor faults
• Supports optimal fuel economy by maintaining proper combustion

Installation Notes and Tips

When installing the NTK 25079 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the threaded mounting hole. Verify the wiring harness length and connector match the vehicle’s factory setup for a secure connection. Follow torque specifications recommended by the vehicle manufacturer to prevent leaks or sensor damage.

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet strict quality standards, ensuring durability and consistent performance. While specific warranty details for part number 25079 are not provided here, NTK products typically come with a limited warranty covering defects in materials and workmanship. Refer to the product packaging or NTK’s official documentation for exact warranty terms.