Fits all M273 V8 engines from 2007 to 2012. Replace them when they become hard or cracked.
I recommend that the oil separators on the M272 and M273 engines be changed every 40K miles to prevent excess oil from entering your intake manifold. It is best to change these breather hoses when replacing the oil separators, but they will sometimes last up to 100K miles, depending on how much they have been subject to heat. I recommend you just replace them when they become hard to brittle or when they crack at the ends. 272273
M273 V8 Rubber Breather Hose Replacement Kit
$36.60
SKU:
GEG-273BHOSES 
Product Details
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$72.10
2006 to 2012 M273 V8 Oil Separator Replacement Kit
Includes both normal and high-speed V8 oil separators with extras. Should be changed every 40,000 to 50,000 miles.
How do you know if these parts need replacing? If you have driven 50,000 miles since it was installed or last changed then they need to be replaced to prevent oil from entering your intake manifold.