I have a 2009 Toyota IQ 1.0. I put a led kit about a year ago. I didn't have any problems until a month ago. Sometimes in traffic, when the car is idling, the odometer display, low beams and position lights flicker.  An auto electrician said it was the led kit that needed to be replaced, so I replaced them. The problem was not solved. Then I went to another workshop and they told me it was the alternator, so I replaced it.  Now the problem has subsided but it is still present especially