NGK 91187 Spark Plug

NGK Iridium IX Spark Plug Overview

The NGK Iridium IX Spark Plug 91187 is engineered for reliable ignition performance in select Chevrolet, Nissan, and Suzuki vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Iridium center electrode tip for enhanced durability
• Taper cut ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Standard ground configuration with nickel ground electrode core
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.044 inches for precise spark gap
• Flat seat type with 26.5 mm reach and 12 mm thread diameter
• Hex size 14 mm for installation with common tools
• Manufacturer heat range 6 for balanced thermal performance

Iridium IX Spark Plug Product Line Details

The Iridium IX Spark Plug line by NGK is designed to provide enhanced ignition efficiency and longer service life compared to conventional spark plugs. Featuring an iridium center electrode tip, these plugs offer improved wear resistance and stable spark generation, which is critical for maintaining engine performance in vehicles like the Nissan Altima and Chevrolet Equinox. The 91187 part number is part of this line, ensuring compatibility and quality for secondary ignition systems.

Technical Description and Compatibility

This NGK spark plug 91187 incorporates a copper core center electrode combined with an iridium tip, delivering excellent electrical conductivity and durability. The taper cut ground electrode tip design increases spark exposure, promoting better combustion. With a resistance rating of 5000 ohms, it helps reduce electrical noise interference. The flat seat and 26.5 mm reach make it suitable for specific engine configurations found in Chevrolet, Nissan, and Suzuki models such as the Nissan Rogue, Sentra, and Suzuki Equator.

Applications and Problem Solving

• Restores consistent ignition in Chevrolet Altima and Nissan Versa engines
• Reduces misfires and rough idling in Nissan Rogue Select and Suzuki Frontier
• Improves fuel efficiency and throttle response in Nissan Cube and NV200
• Addresses spark plug wear and electrode erosion in compatible vehicles
• Helps maintain stable engine performance under varied driving conditions

Installation Notes and Tips

• Ensure the spark plug gap is set to the specified 0.044 inches before installation
• Use a 14 mm socket wrench for proper tightening to avoid damage
• Verify flat seat compatibility with the engine cylinder head
• Apply anti-seize compound sparingly on threads if recommended by the vehicle manufacturer
• Torque to manufacturer specifications to prevent over-tightening

Quality Assurance and Warranty

NGK Iridium IX Spark Plug 91187 is manufactured to meet strict quality standards for ignition components. The use of premium materials such as iridium and copper ensures durability and consistent performance. While specific warranty details may vary, NGK typically offers coverage against manufacturing defects, supporting reliability for Chevrolet, Nissan, and Suzuki vehicle owners.