Spark Plug Spark plug igniting the air-fuel mixture in the combustion chamber RIDEX "686S0051" - Not availableBMW - 3 (E91, E92), 5, 1 (E81, E87), X3; OPEL - Vectra C; SAAB - 9-3, 9-5; VAUXHALL - Vectra; MITSUBISHI - Colt; ...