NGK 4997 Spark Plug

NGK Laser Platinum Spark Plug 4997 Overview

NGK Laser Platinum Spark Plug 4997 is built for direct replacement service in a wide range of Chrysler, Dodge, and Jeep applications. It combines a platinum center electrode tip with a nickel ground electrode and a copper core center electrode for stable ignition performance in OE-style secondary ignition systems.

The Laser Platinum line is NGK’s premium spark plug family for drivers who want consistent firing characteristics and long service life in factory-equipped engines. Part number 4997 is a tapered-seat plug with a 14 mm thread, 5/8 hex, 0.052 pre-gap, and 10,000 ohm resistance.

Key Features

• Platinum center electrode tip for durable spark delivery
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode with standard configuration
• Non-removable nut terminal for OE-style ignition connection
• Tapered seat design with 14 mm thread diameter and 25.00 mm reach
• Manufacturer heat range 4
• Part number 4997, also identified as PLZTR4A-13

Detailed Product Information

NGK has a long OE supply history in North America, and this Laser Platinum spark plug reflects that focus on original-equipment standards and broad vehicle coverage. The platinum tip helps maintain consistent spark performance, while the copper core supports thermal control in everyday driving conditions. For shoppers searching for a Chrysler PT Cruiser spark plug, Dodge Ram 1500 spark plug, or Jeep Wrangler spark plug, NGK 4997 is a direct-fit option for many listed applications.

This part cross-references Anchor 8161 and 9664 for the same application. It also cross-references 41-834 and FR8KII332X for select applications.

What This Spark Plug Helps Address

• Rough idle caused by worn or fouled spark plugs
• Hard starting from weak or inconsistent ignition output
• Misfire conditions related to aged secondary ignition components
• Reduced throttle response from degraded spark quality
• Maintenance replacement on Chrysler, Dodge, and Jeep engines with confirmed fitment

Installation Notes and Fitment Tips

• Fits 2001-2010 Chrysler PT Cruiser, adjust spark plug gap to 0.044 inches.
• Fits 2005-2008 Chrysler 300, Twin Spark System with a 0.044" gap.
• Fits 2006-2008 Dodge Charger, Twin Spark System with a 0.044" gap.
• Fits 2003-2008 Dodge Ram 1500, Twin Spark System with a 0.044" gap.
• Fits 2005-2008 Jeep Grand Cherokee, Twin Spark System with a 0.044" gap.
• Fits 2003-2006 Jeep Wrangler, adjust spark plug gap to 0.044 inches.
• Fits 2004-2005 Jeep Liberty, adjust spark plug gap to 0.044 inches.

Verify engine code and plug gap before installation. Several listed Chrysler, Dodge, and Jeep applications require a 0.044 inch gap rather than the 0.052 pre-gap shown in the plug specification, so set the gap to the vehicle requirement before service.

Quality Assurance

NGK manufactures spark plugs for domestic and import vehicles with OE-focused standards, backed by more than 80 years of automotive ignition experience. Part number 4997 is produced to support durability and consistent operational performance across the listed applications.