This NGK spark plug, part number 3521, is engineered to deliver consistent and powerful sparks for efficient combustion. Its advanced design ensures reliable starting and smooth engine operation across various driving conditions. NGK is a globally recognized leader in ignition technology, known for its commitment to quality and innovation. This spark plug benefits from extensive research and development, providing durability and performance that drivers can depend on. Replacing your spark plugs at recommended intervals is crucial for maintaining fuel efficiency and reducing emissions. The NGK 3521 is a direct fit for compatible vehicles, ensuring a straightforward installation process.