I have had my Infiniti Q45 for 10 years. It has 190,000 miles on it and the only thing that has ever been wrong (other than standard maintenance) on it is the alternator at 135,000 miles. It is simply an amazing vehicle and is a VERY underrated vehicle. I finally bought a new Nissan this year but gave the Q45 to my 16 yr old daughter. After 4 months, I want my Q45 back! Best car Ever!