NTK 21513 Oxygen Sensor

Overview of NTK Direct Fit Oxygen Sensor 21513

The NTK Direct Fit Oxygen Sensor 21513 is engineered for precise emission control in select GM 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 Buick, Cadillac, Chevrolet, GMC, and Pontiac models
• Threaded mounting type with 18mm thread diameter
• Four-wire configuration for reliable signal transmission
• 15.75-inch wiring harness length for proper installation

Direct Fit Oxygen Sensor Product Line Details

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 with vehicle-specific connectors and mounting styles, reducing installation time and ensuring proper sensor operation. The 21513 part number belongs to this line, offering a precise fit for various GM trucks and SUVs.

Detailed Product Description

The NTK 21513 oxygen sensor features a heated sensor element that allows it to reach operating temperature quickly, improving emission control efficiency shortly after engine start. Its four-wire design supports both the sensor signal and heater circuit, ensuring consistent performance. The 18mm threaded mounting type secures the sensor firmly in place, while the 15.75-inch wiring harness length provides adequate reach for factory-style installation. This sensor is specifically designed for compatibility with models such as the Chevrolet Silverado 1500 HD, GMC Sierra 2500 HD, Cadillac Escalade, Buick LaCrosse, and Pontiac Grand Prix, among others.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for proper fuel mixture control
• Resolves check engine light codes related to oxygen sensor failure
• Improves fuel efficiency by providing correct air-fuel ratio data
• Reduces harmful emissions by ensuring proper catalytic converter function
• Eliminates rough idling or engine hesitation caused by faulty sensors

Installation Notes and Tips

• Ensure vehicle compatibility by verifying make and model before installation
• Use proper tools to avoid damaging the 18mm threaded sensor during removal or installation
• Check wiring harness length (15.75 inches) to confirm fitment with factory connectors
• Follow manufacturer torque specifications to secure the sensor without over-tightening
• Allow the engine to cool before sensor replacement to prevent burns or damage

Quality Assurance and Warranty

NTK oxygen sensors are manufactured to meet strict OEM standards for durability and performance. The Direct Fit Oxygen Sensor 21513 undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, NTK typically offers coverage against defects in materials and workmanship to support long-term use in compatible Buick, Cadillac, Chevrolet, GMC, and Pontiac vehicles.