Bosch 7405 Spark Plug

Overview of Bosch Nickel Spark Plug 7405

The Bosch Nickel Spark Plug 7405 is engineered for reliable ignition performance in select BMW and Volkswagen models. Designed with a 4-electrode ground configuration and nickel-yttrium materials, this spark plug supports efficient combustion and consistent engine operation.

• Resistance: 5000 ohms for noise suppression
• Ground Electrode Quantity: 4 for improved spark stability
• Pre-Gap Size: 1.6 mm for optimal ignition
• Hex Size: 16 mm for standard installation tools
• Thread Diameter: 14 mm with 19 mm reach
• Center and Ground Electrode Tips made of nickel-yttrium
• Ceramic non-projected insulator for durability
• Flat seat type for secure fitment
• Manufacturer Heat Range: 8 suitable for 4-cycle engines

Detailed Product Features and Specifications

The Bosch Nickel 7405 spark plug features a multiple ground electrode tip design with four ground electrodes, enhancing spark exposure and combustion efficiency. The center electrode core combines nickel-yttrium and copper materials, providing stable conductivity and resistance to wear. Its 5000 ohm resistor helps reduce electromagnetic interference, protecting vehicle electronics. The ceramic insulator is non-projected, contributing to heat resistance and mechanical strength. With a flat seat and 19 mm reach, this spark plug fits securely in compatible engines, including BMW M3 and Z3 models as well as Volkswagen Golf, Jetta, Passat, Corrado, and EuroVan.

About the Bosch Nickel Product Line

The Bosch Nickel line focuses on spark plugs constructed with nickel-yttrium electrode materials, offering a balance of durability and conductivity. This product line is designed for 4-cycle engines requiring reliable ignition components with moderate heat ranges. The Nickel series spark plugs are engineered to meet OEM specifications for European vehicles, ensuring compatibility and performance in BMW and Volkswagen applications.

Compatible Vehicles and Common Applications

• BMW M3 and Z3 models requiring precise ignition components
• Volkswagen Golf, Jetta, Passat, Corrado, and EuroVan spark plug replacements
• Addressing issues such as misfires, rough idling, and poor fuel economy
• Suitable for engines needing a heat range 8 spark plug
• Replacement for worn or fouled spark plugs in 4-cycle engines

Installation Notes and Tips

• Ensure the spark plug gap is set to 1.6 mm before installation
• Use a 16 mm socket wrench for proper tightening
• Verify flat seat compatibility with the engine cylinder head
• Apply anti-seize compound sparingly on threads if recommended by the vehicle manufacturer
• Torque to manufacturer specifications to avoid damage

Quality Assurance and Warranty

Bosch manufactures the 7405 spark plug to meet strict quality standards, ensuring consistent performance and durability. The use of nickel-yttrium and copper materials in the electrodes supports long service life. While specific warranty details depend on the vehicle manufacturer or installer, Bosch products typically come with a limited warranty against manufacturing defects.