How long time takes to light up the burner since you turn the control ON?
If it takes more than 70 seconds, replace the oven igniter (#9 on the
diagram).
Remove the Bake burner and check for a burned through holes. Make sure all fire holes are clean.
- The oven Bake igniter
Part number: AP4012072 
- The Bake burner
Part number: AP4093607 
Here are the breakdown diagrams and
Replacement parts for MAGIC CHEF 3458KVW Range - S/c F/s Gas | AppliancePartsPros.com
Gene.