NGK 90465 Spark Plug

Overview of NGK Ruthenium HX High Ignitability Spark Plug

The NGK Ruthenium HX High Ignitability Spark Plug (part number 90465) is engineered for reliable ignition performance in select Acura, BMW, and Honda vehicles. Designed to meet the demands of models like the Honda Civic, BMW M3, M5, M6, and Acura RDX, this spark plug offers consistent firing and durability.

• Ruthenium center electrode tip for enhanced ignitability
• Projected square platinum ground electrode for stable spark
• Copper core materials in both center and ground electrodes for efficient conductivity
• Standard ground configuration with a single ground electrode
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.032 inches optimized for ignition performance
• Flat seat type with 12.00 mm thread diameter and 26.5 mm reach
• Hex size of 5/8 inch for installation compatibility
• Manufacturer heat range rating of 8 for balanced thermal performance

Detailed Product Description

The NGK Ruthenium HX High Ignitability Spark Plug is part of NGK's advanced Ruthenium HX line, which focuses on high ignitability and long service life. The ruthenium center electrode tip improves ignition efficiency by requiring less voltage to generate a spark, which supports smoother engine starts and better combustion stability. The projected square platinum ground electrode enhances spark exposure, contributing to consistent ignition under various driving conditions.

Both the center and ground electrodes feature copper cores, which provide excellent thermal conductivity and durability. The spark plug’s flat seat and precise thread diameter ensure a secure fit in compatible engines. With a pre-gap size of 0.032 inches and a heat range of 8, this spark plug balances heat dissipation and fouling resistance, making it suitable for performance-oriented vehicles like the BMW M3 and M5 as well as daily drivers such as the Honda Civic and Acura RDX.

Compatible Vehicles and Applications

• Acura RDX ignition system maintenance
• BMW M3, M5, M6 spark plug replacement
• Honda Civic ignition performance enhancement
• Secondary ignition system repairs requiring high ignitability plugs
• Addressing misfires, rough idling, and poor fuel economy in compatible models

Installation Notes and Tips

When installing the NGK 90465 spark plug, ensure the engine is cool to prevent thread damage. Use a torque wrench to tighten the spark plug to the manufacturer’s specifications, typically around 18-22 lb-ft, to avoid over-tightening. The 5/8 inch hex size allows for standard spark plug socket compatibility. Verify the pre-gap size of 0.032 inches before installation, adjusting if necessary to match vehicle requirements.

Quality Assurance and Warranty

NGK spark plugs undergo rigorous quality control to meet OEM standards. The Ruthenium HX High Ignitability Spark Plug is manufactured with precision materials including ruthenium and platinum to ensure durability and consistent performance. While specific warranty details may vary, NGK products generally come with a limited warranty against manufacturing defects. Consult vehicle and NGK documentation for exact warranty terms.