NGK 4588 Spark Plug

NGK Laser Platinum Spark Plug 4588 Overview

NGK Laser Platinum Spark Plug 4588 is built for precise ignition performance in select import and domestic applications. This spark plug uses a platinum center electrode, nickel ground electrode, and a 5,000-ohm resistor to support stable spark delivery and consistent engine operation.

Compatible With 2007-2008 Kia Rondo, 1998-2000 Mercedes-Benz SLK230, 1982 Mercury LN7, 1981 Ford Escort, and 1981 Mercury Lynx. The NGK PFR5A-11 design is also referenced by part number 4588 for direct replacement searches.

Key Features

• Laser Platinum spark plug design for OE-style ignition service
• Platinum center electrode tip for durable spark performance
• Nickel ground electrode with standard configuration
• 5,000-ohm resistor helps control electrical noise
• 14 mm thread diameter, 0.75 reach, and flat seat design
• Pre-gapped to .044 inches for listed applications unless notes specify otherwise
• NGK part number PFR5A-11, stock number 4588

Product Details

NGK’s Laser Platinum line is positioned for vehicles that need a spark plug with OE-level construction and dependable ignition characteristics. This plug combines a copper core center electrode with a platinum tip to support consistent combustion, while the standard ground electrode layout and 5/8 hex size make it a straightforward service part for the listed vehicles. Search by NGK 4588 or PFR5A-11 when matching the correct replacement.

This part cross-references AMS Automotive 4588 for the same application.

Common Issues This Part Can Address

• Rough idle caused by worn spark plugs
• Hard starting from weak ignition output
• Misfire conditions related to plug wear or gap drift
• Reduced throttle response from inconsistent spark delivery
• Ignition noise concerns in systems that require resistor plugs

Installation Notes and Tips

• Verify the vehicle application before installation using the listed fitment.
• Check the plug gap against the vehicle note: 0.044 inches for most listed applications, and 0.039 inches for 1998-2000 Mercedes-Benz SLK230.
• Use the correct torque procedure for the cylinder head material and thread condition.
• Inspect ignition wires or coil-on-plug components during service to avoid repeat misfire concerns.
• Confirm the seat type is flat and the thread size is 14 mm before installation.

Quality Assurance

NGK is a long-established OE supplier with broad coverage across automotive, motorcycle, marine, and small engine ignition applications. The brand’s manufacturing and distribution network supports consistent product standards for replacement spark plugs such as the 4588.