NTK 25198 Oxygen Sensor - Downstream

Overview of NTK Direct Fit Oxygen Sensor 25198

The NTK Direct Fit Oxygen Sensor 25198 is engineered specifically for Mini Cooper, Cooper Countryman, and Cooper Paceman models. This heated oxygen sensor features a threaded mounting type and a 17.5-inch wiring harness, designed to provide precise emissions control and optimal engine performance.

• Heated sensor type for faster activation
• Specific fit for Mini Cooper, Cooper Countryman, and Cooper Paceman
• Threaded mounting with 18mm thread diameter
• Four-wire configuration for accurate signal transmission
• 17.5-inch wiring harness length for proper installation

Detailed Product Description

The NTK Direct Fit Oxygen Sensor 25198 belongs to the Direct Fit Oxygen Sensor product line, which focuses on providing exact replacement sensors tailored to specific vehicle applications. This ensures compatibility and reduces installation time compared to universal sensors. The heated sensor design allows the oxygen sensor to reach operating temperature quickly, improving fuel efficiency and reducing emissions sooner after engine start.

With a wire quantity of four and a wiring harness length of 17.5 inches, this sensor is designed to integrate seamlessly with the vehicle’s existing wiring system. The 18mm threaded mounting type ensures a secure and leak-free fit, maintaining the integrity of the exhaust system.

Applications and Common Issues Addressed

• Restores accurate air-fuel mixture readings for Mini Cooper, Cooper Countryman, and Cooper Paceman
• Resolves check engine light triggers related to oxygen sensor faults
• Improves fuel economy by providing precise emissions data
• Reduces harmful exhaust emissions by ensuring proper catalytic converter function
• Eliminates rough idling or engine hesitation caused by faulty oxygen sensors

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate oxygen sensor socket for threaded removal and installation
• Verify the wiring harness length and connector compatibility before installation
• Do not over-tighten the sensor; follow manufacturer torque specifications
• Check for exhaust leaks after installation to maintain sensor accuracy

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet OEM specifications, ensuring reliable performance and durability. The Direct Fit Oxygen Sensor 25198 undergoes rigorous testing to comply with emission control standards. Warranty coverage details should be confirmed with the product documentation or supplier.