NGK 6176 Spark Plug

NGK Laser Iridium High Ignitability Spark Plug Overview

The NGK Laser Iridium High Ignitability Spark Plug 6176 is engineered for reliable ignition performance in select Toyota and Lexus vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and consistent engine operation.

• Part Number: 6176 (Dilfr6d11)
• Ground Electrode Tip Design: Dual fine electrode for high ignitability
• Center Electrode Tip Material: Iridium for durability and stable spark
• Center Electrode Core Material: Copper for optimal conductivity
• Ground Electrode Core Material: Nickel
• Resistance: 5000 ohms
• Pre-Gap Size: 0.044 inches
• Thread Diameter: 14.00 mm with 26.5 mm reach
• Hex Size: 5/8 inch
• Seat Type: Flat
• Electrical Terminal Type: Non-removable nut
• Manufacturer Heat Range: 6
• Insulator Height: 50.50 mm

About the Laser Iridium High Ignitability Spark Plug Line

The NGK Laser Iridium High Ignitability Spark Plug line focuses on delivering enhanced ignition performance through the use of iridium-tipped center electrodes and a dual fine ground electrode design. This combination improves spark efficiency and durability, making it suitable for modern engines requiring precise ignition timing and stable combustion. The 6176 spark plug is part of this line, offering a balance of longevity and ignition reliability for compatible Toyota and Lexus models.

Technical Details and Compatibility

This spark plug features a copper core center electrode with an iridium tip, which provides excellent electrical conductivity and wear resistance. The dual fine electrode ground tip design enhances ignitability by reducing voltage requirements for spark generation. The nickel ground electrode core ensures structural integrity under high temperatures. With a resistance of 5000 ohms, it helps suppress electrical noise while maintaining spark quality. The flat seat and 14 mm thread diameter with 26.5 mm reach are designed to fit specific engine configurations.

Compatible Vehicles

• Toyota Avalon
• Toyota Camry
• Toyota Highlander
• Toyota RAV4
• Toyota Sienna
• Toyota Venza
• Lexus ES350
• Lexus RX350
• Lexus RX450h

Common Applications and Issues Addressed

• Improves ignition reliability in Toyota Camry and Lexus RX350 engines
• Reduces misfires and rough idling in compatible vehicles
• Supports efficient fuel combustion for better engine performance
• Helps maintain stable engine start-up and acceleration
• Addresses spark plug wear and electrode erosion over time

Installation Notes and Tips

Ensure the spark plug gap is set to the specified pre-gap size of 0.044 inches before installation. Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage to the flat seat or threads. The non-removable nut electrical terminal requires compatible ignition wiring connectors. Inspect the spark plug threads and clean the cylinder head threads if necessary before installation. Replacement intervals should follow vehicle manufacturer recommendations.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards for durability and performance. The Laser Iridium High Ignitability Spark Plug 6176 undergoes rigorous testing to ensure consistent ignition and resistance to electrode wear. Warranty coverage details should be confirmed with the vehicle manufacturer or NGK authorized distributors.