NGK 1555 Spark Plug

NGK Laser Iridium High Ignitability Spark Plug Overview

The NGK Laser Iridium High Ignitability Spark Plug 1555 is engineered for reliable ignition performance and durability. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion in compatible vehicles.

• Iridium center electrode tip for enhanced ignitability
• Copper core center and ground electrodes for optimal conductivity
• Square platinum ground electrode tip to improve ignition reliability
• Standard ground configuration with a single ground electrode
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.032 inches for precise spark delivery
• Flat seat type with 26.5 mm reach and 12 mm thread diameter
• Hex size 14 bi-hex for installation with common tools
• Manufacturer heat range of 8 suitable for specific engine requirements

Detailed Product Description

The NGK Laser Iridium High Ignitability Spark Plug 1555 features a copper core center electrode with an iridium tip, which provides a fine electrode for improved spark efficiency and longer service life. The ground electrode uses a copper core with a square platinum tip, enhancing ignitability and ensuring consistent spark performance. This spark plug has a resistance rating of 5000 ohms, helping to reduce electrical noise and improve ignition system reliability. Its flat seat design and 26.5 mm reach make it compatible with a range of vehicle engines requiring these specifications. The non-removable nut terminal ensures a secure electrical connection, while the 14 bi-hex hex size allows for straightforward installation using standard tools.

About the Laser Iridium High Ignitability Spark Plug Line

The Laser Iridium High Ignitability Spark Plug line from NGK is designed to deliver precise ignition performance through the use of iridium and platinum electrode materials. This product line focuses on improving ignition efficiency and durability, making it suitable for vehicles that demand consistent spark quality and longer service intervals. The 1555 part number is a specific model within this line, tailored to meet particular engine requirements with its heat range and electrode design.

Common Applications and Issues Addressed

• Replacement for worn or fouled spark plugs in compatible vehicles
• Improves cold start performance and reduces misfires
• Helps maintain fuel efficiency by ensuring complete combustion
• Reduces ignition system electrical interference due to resistance design
• Supports stable engine idling and smooth acceleration

Installation Notes and Tips

• Verify vehicle compatibility with NGK part number 1555 before installation
• Use a 14 mm bi-hex socket for proper torque application
• Check and adjust the pre-gap to 0.032 inches if necessary
• Ensure the spark plug seat is clean and free of debris before installation
• Tighten to manufacturer’s recommended torque specifications to avoid damage

Quality Assurance and Warranty

NGK spark plugs, including the Laser Iridium High Ignitability Spark Plug 1555, are manufactured to strict quality standards to ensure reliable performance and durability. The use of high-grade materials such as iridium and platinum contributes to extended service life. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support customer confidence in their ignition components.