If your igniter is no longer functioning, the following link explains how to access and replace one:
http://www.fixya.com/support/r3575727-replacing_an_oven_igniter_on_a_gas_range
If the model number is correct, the part number for a replacement igniter is 5303935066. It comes as an installation kit with instructions. You can purchase one at any of the following websites:
searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com
Prices vary between these sites, so shop and compare.
NOTE: If the replacement igniter connector plug does not match your range, you will be instructed to cut the connector off and splice the wires together using ceramic wires lugs inlcuded with the install kit. DO NOT use standard wire lugs. They will melt due to the extreme heat in the oven. The igniter wires and wire lugs are heat resistant.
If you have any questions about this repair, or if your model number is different, please post back and let me know. I hope this helps you.