Spark Plug Spark plug igniting the air-fuel mixture in the combustion chamber ESTANFI "EST-PFR6Q" - Not availableAUDI - A4, A6, A3, TT, Allroad; SEAT - Leon, Alhambra; VW - Passat, Golf; SKODA - Octavia, Superb; ALFA ROMEO - 33, 156