Car is great all around. However the humming is awful around 40 mph. The only fix is to replace the rear differential or live with it. One bearing in the rear diff goes out and lets shavings spread to the other 3 bearings. Dealership wants 6k plus to fix but there is a company on the east coast that rebuilds them and sells rebuilt units for 1300 bucks with a lifetime warranty. My car has 200,000 miles on it now so for me I just change the fluid every few months and live with it for now. As long as you have fluid in it it should be okay. If the fluid leaks out, it could seize up. I have driven it like this for about 20,000 miles and it hasn't gotten any worse or better. Just annoying. On the up side, the radio is awesome so just turn on some music.