The BMW 3 Series has been one of the most widely purchased luxury vehicles in America, and carmakers — from Infiniti to Cadillac — are trying to copy this seemingly popular formula. For the 2012 model year, BMW refines the 3 Series’ recipe, once again, with a smarter transmission, fuel-efficient engine lineup with auto start/stop and a regenerative braking system. Continue link below to get more of our thoughts on the new 3 Series, and make sure to check out our other most-read reviews from the week, too, with the links below: