Spark Plug DENSO Q20P-U (3125)

The DENSO Q20P-U (3125) spark plug is a reliable standard-grade solution featuring the patented U-Groove technology. The unique U-shaped groove on the ground electrode allows the spark to form in the center of the gap, creating a larger and hotter flame kernel, which enhances combustion performance even with lean fuel mixtures. The plug features a heat range of 20, a 14 mm thread diameter, and a 19 mm thread reach, providing excellent thermal conductivity and protection against pre-ignition. This model is versatile and suitable for a wide range of older generation Japanese and European vehicles requiring standard heat ratings. Using the Q20P-U results in smoother idling and reduced exhaust emissions. It is an economical choice that combines Denso's original equipment quality with affordable maintenance costs.