NGK 4014 Spark Plug

NGK Laser Platinum Spark Plug 4014

NGK Laser Platinum Spark Plug 4014 is an OE-style ignition component built for stable spark delivery and consistent combustion performance. It uses a platinum center electrode, nickel ground electrode, and a 0.044 in pre-gap to match the specified service setup for select Nissan, INFINITI, and Subaru applications.

The Laser Platinum line focuses on original-equipment fit and long service intervals, backed by NGK’s role as a major OE spark plug supplier in North America. Part number 4014 is also identified as PFR6B-11.

Key Features

• Platinum center electrode tip for durable spark performance
• Nickel ground electrode with standard ground configuration
• 0.044 in pre-gap for specified OE applications
• 5,000 ohm resistance for ignition system compatibility
• 14 mm thread diameter, 5/8 in hex, flat seat, 0.75 in reach
• Non-removable nut terminal for secure connection
• Heat range 6 for the listed factory applications

Detailed Description

NGK 4014 is a Laser Platinum spark plug engineered around OE specifications, including a copper core center electrode, platinum tip material, and standard single-ground design. The construction supports reliable ignition performance in vehicles that call for the PFR6B-11 specification, including 1991-1996 INFINITI G20, 1989-1994 Nissan Maxima, 1991-1993 Nissan NX, 1998-1999 Nissan Sentra, 1995-1998 Nissan 200SX, 1993-1997 Subaru Impreza, 1990-1994 Subaru Legacy, and 1990-1992 INFINITI M30. If you are searching for an NGK Laser Platinum Spark Plug 4014 for Nissan Sentra, Nissan Maxima, or INFINITI G20 service, this part matches the listed OE-style application data.

This part cross-references DENSO Auto Parts 4014 for the same application.

Common Issues It May Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire conditions related to incorrect plug gap or wear
• Reduced throttle response from inconsistent spark delivery
• Service replacement for factory-specified spark plug intervals

Installation Notes and Tips

• Verify the engine calls for part number PFR6B-11 before installation.
• Confirm the plug gap is set to 0.044 in if your application requires it.
• Use the correct torque procedure for the 14 mm flat-seat design.
• Inspect ignition wires, coils, and boots during spark plug service.
• Check the vehicle’s service schedule for the recommended replacement interval.

Quality Assurance

NGK is a long-established OE spark plug supplier with manufacturing and distribution operations in North America and global production support. The brand’s OE background and application coverage make NGK 4014 a direct-fit choice for the listed Nissan, INFINITI, and Subaru vehicles.