You access the igniters from the top of the cooktop by loosening the brass nuts on each burner . A little wd-40 worked to loosen the brass nuts .You may want to get the specific tool used to loosen the brass nut but I just taped it loose with a screwdriver and a little WD-40 . (Be Careful with the screwdriver ) You have to put the spring & clip on the new igniter which helps if you have someone with small hands to help. Next unscrew the brass nut then feed the igniter wire thru the burner , pull the old igniter off the wire . Be careful taking the old igniter off the burner . The burner is fragile and breaks easy . snap the new igniter on the wire That's all there is to it .This would have been a quick job had I realized the I did not have to disconnect the gas and pull the cooktop out .. The hardest part of the job is getting the brass nut loose.