NGK 97506 Spark Plug

NGK Laser Iridium High Ignitability Spark Plug Overview

The NGK Laser Iridium High Ignitability Spark Plug (Part Number 97506) is engineered for precision ignition performance in a wide range of BMW models. Designed with advanced materials and a specialized electrode design, this spark plug supports efficient combustion and reliable engine operation.

• Iridium center electrode tip for enhanced durability and ignition
• Square platinum ground electrode tip for high ignitability
• Copper core materials in both center and ground electrodes for optimal conductivity
• Standard ground configuration with a single ground electrode
• Non-removable nut electrical terminal type for secure connection
• Pre-gap size of 0.030 inches for precise spark delivery
• Flat seat type with 12.00 mm thread diameter and 26.5 mm reach
• Hex size 14 bi-hex for easy installation
• Manufacturer heat range 8 suitable for various BMW engine conditions

About the Laser Iridium High Ignitability Spark Plug Line

The NGK Laser Iridium High Ignitability Spark Plug line is designed to provide improved ignition performance through the use of iridium and platinum electrode technology. This product line focuses on delivering consistent spark energy and durability, which is critical for maintaining engine efficiency and reducing misfires. The combination of iridium center electrode and square platinum ground electrode enhances ignitability, making it suitable for high-performance and luxury vehicles such as BMW.

Technical Details and Compatibility

This spark plug features a copper core in both the center and ground electrodes, which improves electrical and thermal conductivity. The single ground electrode with a square platinum tip is optimized for high ignitability, supporting efficient combustion. The non-removable nut terminal ensures a stable electrical connection, while the flat seat and 26.5 mm reach provide proper fitment in compatible engines. The part number Silzkbr8d8s corresponds to NGK's internal designation for this model.

Compatible BMW Models

This NGK spark plug 97506 is compatible with a broad range of BMW vehicles, including but not limited to the 135i, 228i, 320i, 328i, 335i, 428i, 435i, 528i, 535i, 550i, 640i, 650i, 740i, 750i, M2, M3, M4, M5, M6, X1, X3, X4, X5, X6, and Z4 models. It supports both standard and xDrive variants, ensuring proper ignition performance across multiple engine configurations.

Common Applications and Problem Solving

• Improves ignition reliability in BMW engines experiencing misfires
• Enhances fuel efficiency by promoting complete combustion
• Reduces rough idling and engine hesitation
• Supports stable engine performance under varying load conditions
• Helps maintain emissions compliance by ensuring proper spark timing

Installation Notes and Tips

• Verify correct spark plug gap of 0.030 inches before installation
• Use a 14 mm bi-hex socket for proper torque application
• Ensure the flat seat type matches the engine’s cylinder head design
• Apply anti-seize compound sparingly on threads if recommended by the vehicle manufacturer
• Torque to manufacturer specifications to avoid damage or improper sealing

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring consistent performance and durability. The Laser Iridium High Ignitability Spark Plug line undergoes rigorous testing for heat range, electrode wear, and electrical resistance. This product features a resistance rating of 5000 ohms to reduce radio frequency interference. Warranty coverage details should be confirmed with the vehicle manufacturer or NGK documentation.