BMW 2.0 Petrol Spark Plug Seal Kit N42 & N46 ENGINE CODES . N42 & 46 ENGINES ONLY. 2005-2008 E85 Z4 2.0i. 2009-2015 E84 X1 sDrive18i / xDrive18i. After chasing our own boost and oil leaks from using available gasket sets we were forced to develop our own system one that's now used worldwide.
