Currently, DENSO Corporation is the 4th largest automotive component supplier in the world. Their initial entry into the automotive aftermarket began with the introduction of a complete line of spark plugs. In 1972, DENSO received a patent for the popular U-Groove design. In the early 80s, they became the first to mass-produce the reliable double platinum spark plug.

Their latest achievement breaks the technology barrier with the introduction of the iridium spark plug, made with the most corrosive-resistant metal on earth. DENSO factories are QS9000 / ISO9000 certified worldwide, one more reason why zero defect for parts produced in the millions are a reality.