My 03 350z parking lights are unoperational. I've checked fuses and the light bulbs they all seem to be good in fact all signal lights, hazards and brake lights work including the head lights, but if I switch the switch on just for the parking lights they do not work. Could this be the switch? If the swich is the problem is it easy to change? I would like to the do the job myself.

 

If you are talking about the reflectors that are located separate from the headlight assembly lower on the bumper, they do not light up.

If it is the lights inside of the headlight assembly that are not turning on, check to see if the taillights light up when you turn the light switch to the parking light position. If no lights are turning on at that setting it is probably the switch.