NGK 94290 Spark Plug

NGK Laser Iridium Spark Plug Overview

The NGK Laser Iridium Spark Plug 94290 is engineered for reliable ignition performance in select Audi and Porsche models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 94290 (ILZKR8A)
• Compatible with Audi A8 Quattro and Porsche Cayenne
• Iridium center electrode tip for durability and stable ignition
• Copper core center electrode for optimal conductivity
• Standard ground electrode with nickel core material
• Pre-gap size of 0.032 inches for precise spark delivery
• Flat seat type with 12 mm thread diameter and 26.5 mm reach
• Non-removable nut electrical terminal type
• Manufacturer heat range rating of 8
• Hex size of 5/8 inch for installation

About the NGK Laser Iridium Spark Plug Line

The Laser Iridium Spark Plug line from NGK combines iridium-tipped electrodes with copper cores to balance longevity and electrical performance. This design reduces electrode wear and maintains stable spark energy, which is critical for modern engines like those in the Audi A8 Quattro and Porsche Cayenne. The 94290 spark plug benefits from this technology, providing consistent ignition and improved combustion efficiency.

Technical Details and Specifications

This NGK spark plug features a single ground electrode with a standard design and nickel core material, ensuring durability under high temperatures. The center electrode uses a copper core for enhanced conductivity, topped with an iridium tip to resist erosion. The pre-gap is set at 0.032 inches, optimized for the ignition systems in compatible vehicles. The flat seat and 12 mm thread diameter ensure proper sealing and fitment, while the 26.5 mm reach matches factory specifications. The non-removable nut terminal type simplifies electrical connection, and the heat range of 8 suits the thermal requirements of the specified Audi and Porsche engines.

Applications and Problem Solving

• Restores reliable ignition in Audi A8 Quattro and Porsche Cayenne engines
• Addresses misfires caused by worn or damaged spark plugs
• Improves fuel efficiency by ensuring consistent spark delivery
• Reduces rough idling and engine hesitation
• Helps maintain optimal engine performance and emissions control

Installation Notes and Tips

When installing the NGK Laser Iridium Spark Plug 94290, ensure the spark plug gap is verified at 0.032 inches before installation. Use a 5/8 inch socket for proper torque application. The flat seat design requires careful tightening to factory specifications to avoid sealing issues. Avoid over-tightening to prevent thread damage. This spark plug is compatible with the ignition systems of Audi A8 Quattro and Porsche Cayenne models, so confirm vehicle fitment prior to installation.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The Laser Iridium Spark Plug 94290 undergoes rigorous testing for heat resistance and electrical reliability. While specific warranty details may vary, NGK products typically come with manufacturer-backed warranties covering defects in materials and workmanship.