BMW Piston Ring Set - Genuine BMW 11257549510
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One piston ring set require per piston, includes compression ring, wiper ring, and oil ring

Piston rings seal the piston inside the cylinder bore. Generally speaking when doing an engine rebuild you will want to install new piston rings. There are three unique piston rings used in most applications. Each piston ring has it's own task.

Compression ring:
The compression ring is the ring located at the top of the piston. Because of it's position it receives a majority of the abuse from the combustion process. The compression ring actually transfer about 70% of the heat in the cylinder to the engine block.

Wiper ring/secondary compression ring
The wiper ring, also known as the scraper ring or secondary compression ring, optimizes the distribution of oil film on the cylinder walls. it is also the secondary compression ring but sees significantly less stress from the combustion process. It is located in the second position on the piston.

Oil ring
The oil ring works within the engine to lubricate the cylinder, cylinder walls, pistons, rings, and wrist pins. This ring keeps out out of the combustion process and also aid in thermal control by directing oil around the piston and other moving parts within the cylinder. This ring is located at the bottom of the piston

Fits These Cars:

2004 BMW X5 Engine Piston Ring Set
Engine base: 4.8L V8
2005 BMW X5 Engine Piston Ring Set
Engine base: 4.8L V8
2006 BMW X5 Engine Piston Ring Set
Engine base: 4.8L V8
2007 BMW X5 Engine Piston Ring Set
Engine base: 4.8L V8
2008 BMW X5 Engine Piston Ring Set
Engine base: 4.8L V8
2009 BMW X5 Engine Piston Ring Set
Engine base: 4.8L V8, Sub model: xDrive48i
2010 BMW X5 Engine Piston Ring Set
Engine base: 4.8L V8, Sub model: xDrive48i
2006 BMW 750Li Engine Piston Ring Set
Engine base: 4.8L V8
2007 BMW 750Li Engine Piston Ring Set
Engine base: 4.8L V8
2008 BMW 750Li Engine Piston Ring Set
Engine base: 4.8L V8
2006 BMW 750i Engine Piston Ring Set
Engine base: 4.8L V8
2007 BMW 750i Engine Piston Ring Set
Engine base: 4.8L V8
2008 BMW 750i Engine Piston Ring Set
Engine base: 4.8L V8
2006 BMW 550i Engine Piston Ring Set
Engine base: 4.8L V8
2007 BMW 550i Engine Piston Ring Set
Engine base: 4.8L V8
2008 BMW 550i Engine Piston Ring Set
Engine base: 4.8L V8
2009 BMW 550i Engine Piston Ring Set
Engine base: 4.8L V8
2010 BMW 550i Engine Piston Ring Set
Engine base: 4.8L V8
2006 BMW 650i Engine Piston Ring Set
Engine base: 4.8L V8
2007 BMW 650i Engine Piston Ring Set
Engine base: 4.8L V8
2008 BMW 650i Engine Piston Ring Set
Engine base: 4.8L V8
2009 BMW 650i Engine Piston Ring Set
Engine base: 4.8L V8
2010 BMW 650i Engine Piston Ring Set
Engine base: 4.8L V8
2007 BMW Alpina B7 Engine Piston Ring Set
Engine base: 4.4L V8
2008 BMW Alpina B7 Engine Piston Ring Set
Engine base: 4.4L V8
Product match fitment

BMW Piston Ring Set - Genuine BMW 11257549510

Brand:
Genuine bmw logoGenuine BMW
SKU #:
BMW-11257549510
Part:
Engine Piston Ring Set
OE Numbers:
11257549510, 11257543324
FCP ID:
222926
$103.99 MSRP: $125.99
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