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In the process of changing my filter during a routine oil change in my 2012 Touareg 3.0 TDI a fuel return line was damaged. This line is one of the lines you have to move aside in order to get the filter and cap pulled and installed (its behind the oil filter cap and is sleeved with a mesh covering) . I was shocked at how brittle and flimsy this plastic line was considering it is right by the oil cover and that it has to be moved every time you change oil filter. It is literally the thickness of a drinking straw. Is it possible that this plastic line gets brittle due to heat or age?? I ended up replacing it with a rubber hose for now and it is fine.

Some thoughts.
1)why is this line even In the way of the filter cover in the first place
2) why is it made of plastic ?
 
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