Nissan Tiida Tiida Sylphy Livina Iridium Spark Plug 22401-ED815 LZKAR6AP-11

This spark plug directly replaces OEM numbers 22401-ED815 and LZKAR6AP-11; highly versatile across batches. Core function is to convert high voltage from the ignition coil into a spark to ignite the air-fuel mixture in the cylinder, ensuring normal engine operation. Fits Nissan Primera, Tiida, Sunny, Sylphy and other post-2000 models; after installation, idle becomes smoother, acceleration responds faster, and fuel economy improves. If starting is hard, acceleration hesitates, or fuel economy rises unexpectedly, the spark plug aging is the likely cause.