I was looking at buying an older SUV, I had never used carfax and decided to give it a try. I found a fixer upper on craigslist that I would still be able to drive as I worked on it. I asked the owner some very specific and detailed questions about the smog and other safety features. I then ran carfax that night on the SUV. CARFAX came back and told me what month and year the SUV was smogged and that it failed it's last smog. When I confronted the guy and called hIm out on the lie he began to back track. After looking more at carfax on this vehicle I noticed even more lies. Due to carfax I was able to steer away from that SUV and I eventually found the old fixer upper I was looking for. I ran a carfax on my, now, truck before I bought it and it pointed some things (ie-5 digit milage ) that I didn't notice myself and got the price down. Thanks carfax.