NGK 7418 Spark Plug

NGK Laser Iridium Spark Plug 7418 Overview

NGK 7418 is a Laser Iridium spark plug built for OE-style ignition performance in select Suzuki and Chevrolet applications. It uses an iridium center electrode, nickel ground electrode, and a 0.044 in pre-gap to match factory specifications on listed vehicles.

The Laser Iridium line is part of NGK’s OE-focused spark plug family, backed by the company’s long history as a major original equipment supplier in North America. For drivers servicing a Suzuki SX4, Grand Vitara, Vitara, XL-7, or Chevrolet Tracker, part number 7418 provides the correct heat range and terminal style for the listed applications.

Key Features

• NGK Laser Iridium spark plug, part number 7418
• Iridium center electrode tip for stable ignition performance
• Nickel ground electrode with standard configuration
• 0.044 in pre-gap for OE-specified applications
• 14 mm thread diameter, 0.75 in reach, flat seat
• 5 k? resistance and non-removable nut terminal
• Heat range 5 for listed OE applications

Detailed Description

NGK 7418, also identified as IFR5J11, is a Laser Iridium spark plug engineered to match factory-style ignition requirements on select Suzuki and Chevrolet vehicles. The iridium center electrode supports consistent spark delivery, while the copper core and standard nickel ground electrode follow the OE-style design used in the listed applications. This spark plug is specified with a 0.044 in gap, 14 mm thread diameter, 0.75 in reach, flat seat, and 5/8 in hex size.

Fits 2007-2009 Suzuki SX4, N/A. Fits 2003-2005 Suzuki Grand Vitara, N/A. Fits 2001-2004 Chevrolet Tracker, N/A. Fits 2003-2004 Suzuki Vitara, N/A. Fits 2003 Suzuki XL-7, N/A. Fits 2000-2002 Suzuki Grand Vitara, N/A. Fits 2000-2002 Suzuki Vitara, N/A. Fits 2002 Suzuki XL-7, N/A. This part cross-references Champion Spark Plug 7418 for the same application.

Common Issues This Part Addresses

• Misfires caused by worn or eroded spark plug electrodes
• Hard starting from degraded ignition performance
• Rough idle related to incorrect plug gap or aging plugs
• Reduced throttle response from inconsistent spark delivery
• Service interval maintenance on OE-specified ignition systems

Installation Notes and Tips

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

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across automotive applications in North America. Part number 7418 is built to OE-style standards for the listed Suzuki and Chevrolet fitments.