NGK 3588 Spark Plug

NGK Laser Iridium Spark Plug 3588 Overview

NGK Laser Iridium Spark Plug 3588 is an OE-style ignition component built for precise spark delivery, stable combustion, and long service intervals. It is a direct-fit spark plug for select Mercedes-Benz applications, including Mercedes-Benz G55 AMG, SL55 AMG, CL55 AMG, CLS55 AMG, E55 AMG, S55 AMG, SLR McLaren, and C230 fitments listed below.

The Laser Iridium line focuses on fine-wire iridium center electrode performance with a standard ground configuration and a factory-style 0.032-inch pre-gap. For buyers searching for NGK 3588 spark plug replacement, this part number also cross-references DENSO Auto Parts 4704 for the same application.

Key Features

• Laser Iridium center electrode tip material for consistent ignition performance
• Standard ground electrode tip design and standard ground configuration
• 0.032-inch pre-gap for listed Mercedes-Benz applications
• 14.00 mm thread diameter, 26.5 mm reach, and 5/8 hex size
• Flat seat design with removable nut terminal
• Copper core construction in the center and ground electrodes
• 1000 ohm resistance for ignition system compatibility
• NGK part number 3588 / ILFR6A

Detailed Product Description

NGK 3588 is part of NGK’s Laser Iridium spark plug line, a product family focused on OE-level fit, durability, and stable operation across a wide range of domestic and import vehicles. NGK has long supplied original equipment spark plugs in North America, and this plug reflects that OE-oriented approach with a precise thread size, flat seat, and factory-style gap specification. It is a strong match for drivers looking for a Mercedes-Benz spark plug replacement that follows the original application requirements.

Compatible With 2003-2006 Mercedes-Benz E55 AMG, 2003-2006 Mercedes-Benz S55 AMG, 2003-2006 Mercedes-Benz CL55 AMG, 2003-2007 Mercedes-Benz SL55 AMG, 2005-2009 Mercedes-Benz SLR McLaren, 2003-2005 Mercedes-Benz C230, and other listed Mercedes-Benz AMG applications. Search terms such as Mercedes-Benz G55 AMG spark plug 3588, NGK ILFR6A replacement, and Laser Iridium spark plug for Mercedes-Benz AMG models all point to this OE-style service part.

What This Spark Plug Helps Address

• Misfires caused by worn or fouled spark plugs
• Rough idle and inconsistent combustion
• Hard starting related to weak ignition output
• Reduced throttle response from degraded spark quality
• Service replacement for factory-specified spark plug intervals

Installation Notes and Tips

• Verify the application against the vehicle’s engine code and service information before installation.
• Use the listed 0.032-inch gap for the confirmed applications unless factory service data specifies otherwise.
• Inspect ignition coils, boots, and wiring during spark plug service to avoid repeat misfire concerns.
• Apply proper torque using the manufacturer’s service procedure for the cylinder head material and seat type.
• For Mercedes-Benz G55 AMG and SL55 AMG fitments, confirm the dual-plug engine configuration before ordering.

Quality Assurance

NGK manufactures spark plugs for OE and aftermarket use with North American and global production support. The brand’s OE supplier background and long automotive history support consistent manufacturing standards for ignition service parts such as NGK 3588.