The front steering knuckle on the passenger side broke causing the wheel to detach. There was loss of control of the car however I was in town and the speed was below 25 mph. Thankfully the vehicle was stopped before anyone was hurt. I had an independent service center examine the SUV and found the knuckle to be broken. The vehicle is available for inspection. There were no warning lights prior to the accident. The SUV is serviced during a yearly inspection per state requirements with the last appointment at Range Rover in December. There were no warnings to alert myself (owner) or the dealership when inspected on a regular basis. If the knuckle would have broken five minutes prior, I would have been in a serious car accident as I was traveling 65 mph on the highway.