【Note】N55 engines need using a slightly thinner O ring to install. If a replacement o-ring is needed for future use please see p/n 11537545278 (29x2.9mm).
【Fitment】Engine Fitment: Compatible with N20/N26/N51/N52/N54/N55 Engines; Vehicle Fitment: Compatible with 1 Series E81/E82/E87/E88 125i 128i 130i 135i 135is 1M 2008-2013; Compatible with 3 Series E90/E91/E92/E93 323i 325i 328i 330i 335i 2005-2012; Compatible with 5 Series E60/E61 523i 525i 528i 530i 535i 2005-2010; Compatible with X3 Series E83 25i 30i 2006-2010; Compatible with Z4 Series E85/E86 25i 30i 2006-2008; E89 18i 20i 23i 28i 30i 35i 2009-2016 and so on.