Don't worry about either of those things. Just do the routine maintenance and it will serve you well. I would recommend taking the VIN on any Infiniti you're looking at to a dealer and having them pull the service records.rox wrote:I was told to watch for transmission as well as knock sensor problems. The guy telling me this wrapped the conversation around a sales pitch for a used car warrenty. I did not buy the car he was selling. I am looking at a different one at this point.