NGK 5555 Spark Plug

NGK Laser Platinum Spark Plug 5555 Overview

NGK Laser Platinum Spark Plug 5555 is an OE-style ignition component built for stable spark delivery, consistent combustion, and long service life in a wide range of import and domestic applications. It is a direct-fit choice for vehicles such as the Toyota Corolla, Subaru Impreza, and Nissan Frontier where the correct heat range and gap matter.

The Laser Platinum line combines a platinum center electrode tip with a nickel ground electrode and copper core construction to support reliable ignition performance. Part number 5555, also identified as PFR6G-11, is specified with a 0.044 in pre-gap, 14 mm thread diameter, 0.75 in reach, flat seat, and 5/8 in hex.

Key Features

• Laser Platinum center electrode tip for durable spark delivery
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with standard tip design and standard configuration
• 0.044 in pre-gap for listed applications
• 5000 ohm resistance for ignition system compatibility
• 14 mm thread diameter, 0.75 in reach, flat seat, 5/8 in hex
• NGK part number 5555 / PFR6G-11

Product Details

NGK is a major OE spark plug supplier in North America, and this Laser Platinum spark plug reflects that OE-focused engineering approach. The design supports dependable starting, smooth idle quality, and consistent firing characteristics across the listed applications. This part cross-references Monroe Shocks & Struts (e.g., 5555) for the same application.

Compatible vehicle coverage includes Fits 2001-2004 Nissan Frontier, N/A; Fits 2002-2004 Nissan Xterra, N/A; Fits 1995-2004 Subaru Impreza, N/A; Fits 1995-2003 Subaru Legacy, N/A; Fits 2000-2003 Subaru Outback, N/A; Fits 2005-2006 Audi A6 Quattro, N/A; and Fits 2012 Toyota Corolla, N/A. Additional coverage includes applications such as the Chevrolet Cobalt, Saturn Ion, Pontiac Vibe, and Acura Integra.

Common Issues This Part Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to incorrect plug wear or gap drift
• Reduced fuel efficiency from degraded ignition performance
• Loss of throttle response from aging ignition components

Installation Notes and Tips

Verify the OE specification before installation and confirm the listed gap for your exact vehicle application. Some fitments require a 0.040 in gap, while others use 0.044 in, so check the notes for the specific year, make, and model. Use the correct torque procedure for the cylinder head material and inspect ignition wires or coil-on-plug boots during service.

For fitment-specific service, this spark plug is listed for vehicles such as the Subaru Forester, Mazda Miata, Chevrolet Metro, and Mercedes-Benz S600. The part number 5555 should be matched to the application notes before installation.

Quality Assurance

NGK builds spark plugs to OE standards and supports broad coverage across domestic and import vehicles, motorcycles, marine engines, and small engines. The brand’s manufacturing and distribution network is established to maintain consistent product quality and application accuracy.