Denso Q16PR-U 3137 Spark Plug, original factory standard nickel alloy material stable output

Denso Q16PR-U 3137 spark plugs use nickel alloy electrodes, strictly aligned with OE process parameters, offering a typical service life 30,000-50,000 km under normal conditions. As an OE standard replacement, fits multiple Denso-powered engines from 2000 onwards; OEM code Q16PR-U 3137 for cross-reference. Note thread specification M14x1.25; maintains stable idle and acceleration.