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				Another data point...
			 
 
			I bought my 2004 S in 2015 with 25,000 miles on her.  I R&R'd the water pump proactively with an OEM unit. 
 40,000 miles on her now.
 
 So far, so good.
 
 Folks should really look at the water pump as a consumable and just replace it every four years with a new OEM one.
 
 Cheers.
 
				__________________550 SE #310---"It's more fun to drive a slow car fast, than a fast car slow."
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