I have an '05 Baja that started knocking at less than 9,000 miles. Rep says "that's normal". Maybe for a worn out piece of crap, but it shouldn't be for an almost brand new car. They replaced the timing belt tensioner, and it got better, but it still sounds like it's going to blow up on bitter cold mornings for about the first 10 to 15 minutes. No one can explain to me what is so different about this engine that causes this problem. Oh well, I've got about 38,000 miles left on my warranty, we'll see what happens.