Engine piston assembly for BMW E90 325i new car parts N52B25

Description

The N52 engine block is made of magnesium and aluminum. Magnesium is lighter than aluminum but is at greater risk of corrosion from water and may creep under high temperature loads; this makes traditional magnesium alloys unsuitable for the high loads experienced by engine blocks. Therefore, BMW uses magnesium alloy for the crankcase housing and aluminum “inner block” to overcome the limitations of magnesium alloy. The cylinder liners are made from Alusil and a hollow camshaft is used to save weight.

N52B25
130 kW (174 hp):

2006 E90 323i — Canada and Australia
2004-2007 E60/E61 523i
2006-2008 E85 Z4 2.5i
150 kW (201 bhp):

2007-2011 E90 323i — Canada and Australia
2010-2011 F10 523i
2009-2011 E89 Z4 sDrive23i
160 kW (215 bhp):

2005-2010 E83 X3 2.5si, xDrive25i
2005-2010 E60/E61 525i, 525xi — except the United States and Canada
2004-2013 E90/E91/E92/E93 325i, 325xi — except the United States and Canada
2005-2008 E85 Z4 2.5si