Front Crankshaft Seal, 55x68x8, Elring - E90 335d, E70 X5 35d

This is an OEM Front Crankshaft Seal for M57 diesel engines manufactured by Elring Klinger - an original supplier to BMW for many gaskets and seals. If you have a leaking front crank seal on either an E90 335d or E70 X5 35d application, the solution is replacing the failed crank seal with a new one. The M57 diesel was used in model years 2009, 2010, 2011, 2012, and 2013 here in the United States, and more broadly outside the US. 

A common problem on these N57 engines is serpentine belt ingestion, where the serpentine belt may come off (sometimes due to an oil leak), gets wrapped around the crank pulley, and sucked into the front crank seal. 

Replacing this seal is a fairly pretty big job, so you want to make sure you get a good quality replacement so it lasts as long (or longer) than the original seal. 

As an OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.