This DENSO spark plug, part code W16S-U, is engineered to deliver consistent and powerful sparks for efficient combustion. Its robust construction ensures durability and longevity, providing dependable performance for your vehicle's ignition system. Trust DENSO for quality components that contribute to smooth engine operation and fuel economy. Properly functioning spark plugs are crucial for starting your engine and maintaining its power output. Replacing worn spark plugs with high-quality DENSO plugs can help prevent misfires and ensure your vehicle runs at its best.