4 x BMW Genuine Ignition Coil Spark Plug - Ngk Silzbr8D8S Ngk Silzbr8D8S X1 28i X1 28iX Z4 28i ALPINA B6X 528i 528iX 528i 528iX 228i 228iX X3 28i X3 28iX X4 28iX 320i 320iX 328i 328iX 328i 328iX 428i 428iX 428i 428iX 328i 328iX 428i 428iX 4 x BMW Genuine Ignition Coil Spark Plug - Ngk Silzbr8D8S Ngk Silzbr8D8S E84 E89 It is used in Ignition coil/spark plug -- Manufacturer Warranty: 24000 miles or 2 years Please see Product Description below for vehicle compatibility