@Precious 4568 what year is your sedan?

 

I had the same issue with my 05 and my 06 sedan. I tried replacing bulbs etc, but it turned out to be the same thing each time. The bulb socket loosened up over time and the bulb would only come on half the time since it was loose in the socket. I pulled the plastic cover off, grabbed a handful of fiberglass insulation (poly-fil will work) and placed it between the bulb plug and the plastic cover. Once I put the plastic cover back on, the fiberglass insulation provides constant pressure on the back of the bulb. Never had an issue after doing this.