Spark Plug Spark plug igniting the air-fuel mixture in the combustion chamber Denso, K20R-ZU11, Spark Plug, from Not availableAUDI - A4, A6, 100, 80; BMW - 3; ALFA ROMEO - 156; CHEVROLET - Cruze; CITROËN - AX; ALPINA - B3; CHERY - Tiggo; ...