NGK 4213 Spark Plug

NGK Laser Iridium Spark Plug 4213

NGK Laser Iridium Spark Plug 4213 is built for direct OE-style replacement in a range of GM and Saturn applications. It uses an iridium center electrode, nickel ground electrode, and a tapered seat design to support consistent ignition performance in the vehicles listed below.

Key Features

• Laser Iridium spark plug from NGK’s Laser Iridium line
• Iridium center electrode tip with copper core for stable spark delivery
• Nickel ground electrode with standard configuration
• Pre-gapped at 0.044 in. for listed applications
• 14 mm thread diameter, 0.708 in. reach, 5/8 in. hex size
• 5000 ohm resistance and non-removable nut terminal
• Tapered seat design for OE-style cylinder head fitment

Product Details

NGK’s Laser Iridium Spark Plug line is positioned for OE replacement use, combining iridium at the center electrode tip with a copper core and a standard nickel ground electrode. That construction supports reliable ignition in daily-driven vehicles and helps maintain the factory-style service interval specified for many of the listed applications. Part number 4213 is also identified as IZTR4A11 in NGK references.

Compatible With Buick Lucerne, Chevrolet Impala, Chevrolet Malibu, Pontiac G6, Saturn Vue, Chevrolet Uplander, Pontiac Montana, Saturn Aura, Buick Terraza, Chevrolet Monte Carlo, and Saturn Relay applications listed in the fitment data. This part cross-references DENSO Auto Parts (e.g., 4511) for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition firing
• Misfire conditions related to plug wear or gap drift
• Reduced throttle response from degraded spark delivery
• Service replacement needs on OE-equivalent ignition systems

Installation Notes and Tips

• Verify engine application against the vehicle fitment list before installation.
• Confirm the specified 0.044 in. gap if your service procedure calls for inspection before install.
• Use the correct 5/8 in. spark plug socket and follow manufacturer torque specifications.
• Inspect ignition coils and boots during service to help prevent repeat misfire concerns.
• Check the tapered seat condition in the cylinder head before installing the plug.

Quality Assurance

NGK is a major OE spark plug supplier in North America with long-standing manufacturing experience across automotive, motorcycle, marine, and small engine applications. Part number 4213 is produced to OE-style standards for durability and operational performance in the listed vehicles.