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I've had my 2014 (CPO) 228i MSport Coupe for less than a year, and I just "discovered" this discussion. Great explanations by Mike and BEM-S4! As this is my first turbocharged car, I need some basic information: are our intercoolers air cooled or water cooled? For a non-modified car, should I upgrade? If so, what advantages would I get: power, MPG, longevity of engine, etc.? What about warranty issues? A few days ago I came across a dump truck that was dropping something (pebbles?) that hit my car, should I protect the intercooler with mesh? During fall I got a lot of leaves all over the place down there so I used a vacuum cleaner, any other cleaning technique to avoid dirt blocking the fins? Thanks!
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