NGK 5459 Spark Plug

NGK Laser Platinum Spark Plug 5459

The NGK Laser Platinum Spark Plug 5459 is built for direct replacement service in select Acura applications, including RL and TL models. It combines a platinum-tipped center electrode with a nickel ground electrode and a 0.044 in. pre-gap for stable ignition performance.

Key Features

• Laser Platinum design with a platinum center electrode tip
• Copper center electrode core for efficient conductivity
• Nickel ground electrode core with standard ground configuration
• 5,000 ohm resistance for ignition system compatibility
• 0.044 in. pre-gap, 14 mm thread diameter, 0.75 in. reach, and flat seat
• 5/8 in. hex size with non-removable nut terminal
• NGK part number PFR5L-11, stock number 5459

Product Details

NGK’s Laser Platinum Spark Plug line is engineered for OE-style service and consistent operation across a wide range of domestic and import vehicles. Part number 5459 uses a platinum center electrode tip to support durable spark delivery, while the copper core and standard nickel ground electrode help maintain reliable ignition characteristics. This spark plug is specified for 1996-2004 Acura RL and 1996-1998 Acura TL applications, making it a direct-fit choice for Acura RL spark plug replacement and Acura TL ignition service.

This part cross-references AMS Automotive 4701 and Anchor 3275 for the same application.

Common Issues This Part Addresses

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire conditions related to incorrect gap or aged plugs
• Reduced throttle response from inconsistent spark delivery
• Maintenance replacement for high-mileage Acura RL and Acura TL ignition service

Installation Notes and Tips

Verify the engine application against the vehicle’s service information before installation. Confirm the 0.044 in. gap specification and inspect the ignition coil, boots, and plug wells for wear or contamination. Use the correct 5/8 in. spark plug socket and tighten to the manufacturer’s torque specification for the engine.

Quality Assurance

NGK is a long-established OE supplier with extensive North American coverage for domestic and import ignition applications. The Laser Platinum Spark Plug line reflects NGK’s focus on OE-level fit, durability, and consistent performance in service.