主题：认真地请教一下：不再年轻的BMW容易出问题吗？ -- 四不像5

is not additional, but "up to" based on your current warranty, I guess. That means you have 2 additional years to drive without worrying things. I have never seen warranty really that long (4+6 years=10 years and 150K miles). Normally the 10 year warranty you see recently is for Powertrain, not bumper to bumper. The expected cost of warranty increases exponentially with the age of car.