Dave FL 
2011 BMW 3 Series Diesel 335d 4dr Sedan (3.0L 6cyl Turbodiesel 6A)
335d a keeper
 We bought (custom ordered our 335d from the factory) in June 2011 (delivered August 2011).  Had early problem with the Urea delivery pump within 1st 15k mi (fixed under warranty).  At about 40k miles had problem with electronic control center (located behind dash) had replaced under warranty.  We are on our 3rd set of tires - opted for Sport suspension (which adds high speed stability, big rears (lower profile - hence stiffer ride front and back)).   Our BMW certified mechanic says our original brakes should be good for another 15k to 25k miles.  The car is a rocket ship.  We average close to 29mpg combined.  Driving to Orlando (Disney)  from Palm Beach Gardens and back on 1 tank of diesel.  We usually drive in the fast/fast lane and get well over 30mpg on longer trips.  We would buy this car again except you cannot get a 3.0 L diesel in a 3 series anymore - only in a 5 series.  We it maxed with options (adaptive cruise, look around the corner headlight, nav, backup sensors, sun shades, interior light pkg, high end audio ... sticker was close to 60k).   This car will become a collectors item.  (previous cars we've bought include: 89 M3 (collector car), 02 WRX, 02 Passat).   It doesn't dance like the M3 - but it will leave it in the dust.