Ken 
2011 BMW X5 Diesel xDrive35d 4dr SUV AWD (3.0L 6cyl Turbodiesel 6A)
Great to own new and through the warranty period
 Excellent vehicle to own new and if it's still under the warranty period. Love the diesel and, over the past several years, it's cheaper to operate than the premium gas version - also get better mileage (24.6mpg). Easy to get in/out of, very comfortable, great visibility and performance, reliable for at least the first 6-7 years (up to 70,000 miles). Couple of nuisance items prior to warranty expiration: Leather seat issue, cracked woodgrain trim. After I hit the 70,000 mile mark, The repairs started getting expensive. $2300 for the shocks & struts (not bad but did them before they were shot), $2450 for a catalytic converter, $800 for a thermostat, $1300 for Throttle Actuator and Turbo Boost sensors (once at 55k miles and again at 97k miles), $600 for Urea tank sensor, $500 for EGR valve and of course the maintenance stuff: $1500 for brakes twice, $600 for non run flat Continental tires twice (got out of my run flat tires fast), host of oil changes, etc. Get out of it before 70,000 miles while you can still get a decent trade in or a private sale. Another option is to get a third party extended warranty before the problems start. Be warned, BMW's have a lot of sensors and your Check Engine light will be no stranger to you - mine goes on every year when the weather gets cold and the problems start.