Autel MaxiScan MS509 Code Reader
A good price and works better than others tried. I had to think a little but was able to update over the internet.
Autel MaxiScan MS509 save hundred of $.
I had the service alarm that turn on on my car. I went to the garage, the guy plug is scanner, told me that it' a common and no problem error. He reseted the code, and ask me $70 for this 2 minutes work. After less than 10 days the service led turn on again. I looked on Amazon and found the autel MaxiScan for $70. Since I have used it 5 or 6 times on my car and on my friend', so I have saved at least $350.