I used a Bosch reman unit in my 3.0i that I had to replace exactly three years after I put it in (I just replaced it in Feb). I have heard other horror stories about those units as well. I put in a Valeo reman unit this time. Buy from FCP for the warranty to be safe, if you're worried about it.

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2003 3.0 5MT Topasblau
Purchased in 2016 and surprisingly still running
2012 35d Platingrau