BMW Series M On offer, less than 645 will not be considered. For sale: A complete set of original, brand new, dealership-supplied BMW spark plugs in their original packaging. Part Number: 12120039634 (SILZKBR8D8S) Quantity: 8 pieces (full set) Condition: Brand new, unused Compatibility: V8 S63TU engines (M5 / M6 / X5M / X6M) S55 / N55 engines (M3 / M4 / M2)