NGK 91356 Spark Plug

Reliable Ignition Performance for Hyundai, Kia, and Mitsubishi Vehicles

The NGK Ruthenium HX High Ignitability Spark Plug 91356 is engineered to deliver consistent ignition and improved combustion efficiency. Designed specifically for select Hyundai, Kia, and Mitsubishi models, this spark plug supports optimal engine performance and fuel economy.

• Dual fine ground electrode tip design for high ignitability
• Ruthenium center electrode tip for enhanced durability
• Copper core center electrode for efficient conductivity
• Standard ground configuration with nickel ground electrode core
• Non-removable nut electrical terminal type
• Pre-gap size of 0.044 inches for precise spark delivery
• Flat seat type with 12mm thread diameter and 26.5mm reach
• Hex size of 5/8 inch for standard installation tools
• Manufacturer heat range rating of 6

About the Ruthenium HX High Ignitability Spark Plug Line

The Ruthenium HX High Ignitability Spark Plug line from NGK focuses on delivering improved ignition performance through advanced electrode materials and design. The use of ruthenium on the center electrode tip enhances wear resistance and ignition reliability, while the dual fine ground electrode tip design promotes easier spark initiation. This combination supports smoother engine starts and stable combustion in compatible vehicles.

Technical Details and Compatibility

The NGK spark plug part number 91356 features a copper core center electrode with a ruthenium tip, providing a balance of conductivity and durability. The single nickel ground electrode with a dual fine tip design ensures a consistent spark with reduced voltage requirements. With a pre-gap size of 0.044 inches and a flat seat, this spark plug is designed for precise fitment and optimal performance. Compatible with Hyundai Borrego, Elantra, Genesis, Kia models, and Mitsubishi Outlander, it meets the specific ignition needs of these vehicles.

Common Applications and Problem Solving

• Improves ignition reliability in Hyundai Elantra and Kia vehicles
• Reduces misfires and rough idling in Mitsubishi Outlander engines
• Enhances cold start performance for Hyundai Genesis models
• Supports consistent combustion for better fuel efficiency
• Addresses spark plug wear and electrode degradation over time

Installation Notes and Tips

When installing the NGK 91356 spark plug, ensure the pre-gap is set to 0.044 inches if adjustment is necessary. Use a 5/8 inch socket for proper torque application. The flat seat design requires careful seating to avoid damage to the cylinder head. The non-removable nut terminal type is compatible with standard ignition wire connectors. Follow manufacturer torque specifications to prevent over-tightening.

Quality Assurance and Warranty

NGK spark plugs undergo rigorous quality control to meet OEM standards. The Ruthenium HX High Ignitability Spark Plug 91356 is manufactured with high-grade materials including ruthenium and copper electrodes for durability and consistent performance. While specific warranty details are not provided, NGK products typically meet industry reliability expectations for ignition components.