Spark Plug Spark plug igniting the air-fuel mixture in the combustion chamber NGK "LTR5BI-13" - Not availableMAZDA - 6 (GG, GH, GY), 3 (BK, BL), 5 (CR, CW), MPV III (LY), Biante; FORD - Mondeo, Focus; OPEL - Insignia A, Astra G