Spark Plug Spark plug igniting the air-fuel mixture in the combustion chamber Denso, ZK20R13, Spark Plug, from Not availableAUDI - A4, A6, 100, 80; BMW - 3, 5; CITROËN - BX, Xsara; FIAT - Panda; ALFA ROMEO - 156; CHEVROLET - Cruze; ...