A few weeks ago when my wife opened the hatch to put something in the trunk when it was 10 degrees f the rear hatch refused to latch. It finally di later that day. I then had it happen again a few days later and took it to the dealer. The service manager couldn't get it to latch either. After the car sat in the warm service department it latched when a technician was working on it. The dealer sent me off and told me he couldn't find the problem and that it was an anomalie. Three days ago I drove 70 miles from my home to pick up my son from college . The weather was around 10 degrees again and I opened the hatch to load his luggage and it happened again. This time I had to drive 70 miles on the expressway with an open rear hatch. A real nervous experience. The next morning I took a hairdryer out to the garage and heated the latch and was able to get it latched again. I'm taking it back to the dealer and insist they replace the rear latch mechanisim on the hatch. So far I'm not impressed with Toyota's much vaunted quality and dealership network. I also have trouble filling the gas tank on this thing. This is my first Toyota and will probably be my last. I've owned many new cars, foreign and domestic, and have never had so many weird and potentially dangerous problems.