Bosch 6740 Spark Plug

Overview of Bosch OE Fine Wire Platinum Spark Plug 6740

The Bosch OE Fine Wire Platinum Spark Plug 6740 is engineered for reliable ignition performance in select Mitsubishi vehicles. Designed with precision materials and a fine wire platinum center electrode, this spark plug supports efficient combustion and consistent engine operation.

• Fine wire platinum center electrode for improved ignition
• Nickel ground electrode with standard J-gap configuration
• 6000 ohm resistor to reduce electrical interference
• Flat seat type with 14 mm thread diameter and 26.5 mm reach
• Ceramic insulator with non-projected design for durability
• Compatible with Mitsubishi Eclipse, Galant, Lancer, and Outlander models

Detailed Features and Specifications

This Bosch spark plug features a copper core center electrode with a platinum tip, enhancing durability and ignition reliability. The ground electrode is made of nickel with a standard tip design and a J-gap ground configuration, which helps maintain consistent spark performance. The spark plug includes a 6000 ohm resistor to minimize radio frequency interference, ensuring smooth operation of vehicle electronics. Its ceramic insulator is non-projected, providing excellent heat resistance and electrical insulation. The spark plug has a flat seat and a 16 mm hex size for proper installation torque. With a pre-gap size of 0.9 mm and a manufacturer heat range of 8, it is optimized for specific engine conditions found in Mitsubishi vehicles.

About the OE Fine Wire Platinum Product Line

The Bosch OE Fine Wire Platinum line focuses on spark plugs that utilize a fine wire platinum center electrode to deliver precise ignition and longer service life. This technology supports improved fuel efficiency and reduced emissions by promoting a more stable spark. The 6740 spark plug is part of this line, combining platinum durability with copper core conductivity for balanced performance in secondary ignition systems.

Compatible Vehicles and Common Applications

• Replacement spark plug for Mitsubishi Eclipse models
• Suitable for Mitsubishi Galant ignition systems
• Compatible with Mitsubishi Lancer engines
• Fits Mitsubishi Outlander vehicles requiring a 14 mm thread spark plug
• Ideal for 4-cycle engines needing a resistor-type spark plug

Installation Notes and Tips

Ensure the spark plug gap is set to the specified pre-gap size of 0.9 mm before installation. Use a 16 mm socket wrench to tighten the spark plug to the manufacturer’s recommended torque to avoid damage. The flat seat design requires proper seating to maintain compression and prevent leaks. This spark plug features a non-removable nut electrical terminal, so verify compatibility with your ignition wire connectors. Always replace spark plugs in sets for consistent engine performance.

Quality Assurance and Warranty

Bosch manufactures the OE Fine Wire Platinum 6740 spark plug to meet OEM specifications for Mitsubishi vehicles. The use of high-quality materials such as platinum and copper ensures durability and reliable ignition. This spark plug includes a built-in resistor to reduce electrical noise, supporting vehicle electronics. While specific warranty details are not provided, Bosch products typically adhere to strict quality control standards to ensure long-term performance.