NGK 7558 Spark Plug

Reliable Ignition with NGK V-Power Spark Plug 7558

The NGK V-Power Spark Plug 7558 is engineered to deliver consistent ignition performance for select BMW, Mazda, and Saturn vehicles. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for optimal electrical performance
• Standard ground electrode tip and configuration for reliable spark delivery
• Nickel ground electrode core and center electrode tip for durability
• Copper center electrode core material to enhance conductivity
• Pre-gap size of .032 inches for precise spark gap
• Flat seat type with a reach of .75 inches and 14mm thread diameter
• Non-removable nut electrical terminal type for secure connection
• Hex size of 5/8 inch for easy installation
• Manufacturer heat range of 5 suitable for moderate operating temperatures

About the NGK V-Power Spark Plug Line

The V-Power Spark Plug line from NGK focuses on delivering dependable ignition components that balance performance and durability. This product line incorporates quality materials such as copper and nickel to maintain consistent spark and resist electrode wear, making it suitable for a range of secondary ignition applications.

Technical Details and Compatibility

The NGK V-Power Spark Plug 7558 features a single ground electrode with a nickel tip and a copper core center electrode, which enhances electrical conductivity and heat dissipation. Its flat seat design and .75 inch reach ensure proper fitment in compatible engines. This spark plug is compatible with various BMW models including the 750iL, 850Ci, 850CSi, and 850i, as well as Mazda 626 and Saturn Astra and Millenia models. The part number Zfr5f corresponds to this specific configuration, ensuring correct replacement and fitment.

Common Applications and Problem Solving

• Restores consistent ignition in BMW 750iL and 850 series engines
• Improves combustion efficiency in Mazda 626 vehicles
• Addresses misfires and rough idling in Saturn Astra and Millenia models
• Reduces electrode wear and maintains spark quality over time
• Supports stable engine performance under moderate heat conditions

Installation Notes and Tips

When installing the NGK V-Power Spark Plug 7558, ensure the spark plug gap is set to the specified pre-gap size of .032 inches if adjustment is necessary. Use a 5/8 inch socket for proper torque application and avoid over-tightening to prevent damage to the flat seat. The non-removable nut terminal type requires compatible ignition wiring connectors. Always verify compatibility with your vehicle’s make and model before installation.

Quality Assurance and Warranty

NGK spark plugs are manufactured to meet strict quality standards, ensuring reliable performance and durability. The V-Power Spark Plug 7558 undergoes rigorous testing for resistance and heat range compliance. While specific warranty details may vary, NGK products typically come with manufacturer-backed quality assurance to support long-term use in compatible BMW, Mazda, and Saturn vehicles.