I've owned my 2007 Jeep Liberty Sport 4dr rwd for six months now, previously was used as lease and rental vehicle. since purchasing the vehicle, I have replaced the brake light housing, front right window, and motor and regulator to front driver side window. Just this evening my vehicle stalled on me. It is an automatic vehicle and I always change the oil just shy of 3,000 miles using mid grade oil. Anyone having similar problems? why is my car stalling?