I have a little over 600 miles on my 2016 X3 xdrive28d. So far, I'm very happy with the vehicle. I spend about 2 hours a day commuting and the X3 is a great place to be. The 2L turbodiesel is not for racing, but it's plenty quick and accelerates to 70 mph effortlessly. The computer is pretty accurate and mpgs are climbing, currently at 34 mpgs. After adjusting the seats I find them very comfortable (Nevada leather). The interior design is classy, although some of the buttons are difficult to see from the driver's seat. The engine is not as quiet as my Q5 TDI, but you don't hear it cruising down the highway. The car came with 18 inch wheels with Pirelli P7s and they are quiet so far. The idrive infotainment system is complex, but most functions work by voice command and it works well. The build quality is excellent and there are no rattles, even from the panoramic sunroof. The suspension is firm, well composed and comfortable. The auto Stop/Start works well and definitely saves fuel at those long traffic lights. I do disable Start/Stop in sections where I know the stops will be brief. I can't comment on reliability this early on. I always look forward to driving this car.
We bought the X3d for several reasons 18 months ago. 1/ Diesel's are known for their good MPG, we get 33 mpg on and off HWY. We are not very often at the Gas Station and get an average 680 miles from empty to full. 2/. Servicing is only every 10,000 miles or 1 year and our Local BMW Dealership is only 10 miles from home. Very convenient. 3/. Insurance is reasonable and with all the safety aspects we get 36% discount. 4/. Road Side Assistance is all in for 10 years. Part of the deal. BMW give you 4 years Free Maintenance but we offered to pay for an extra 2 years having taken the finance over 6 years. Thus when we have to pay for 7th Maintenance our car will be paid off. The car is a delight to drive and the twin turbo kicks in well when needed. Snow and ice are no problem. X3diesel is always going to hold a good resell factor as a good one is very hard to find. Wife has a mixed back roads and R93 to get to work and when there are delays the GPS finds a way for her for the 20 mile journey each working day. Our back up car is a 2012 Acura RDX and on par with BMW X3d.