There are many different manufacturers of oven ignitors. One of the most common oven ignitor is the Maytag part # 12400035 , this ignitor will work in about half of all stoves, ranges, and ovens made in the US, including Whirlpool, Ge, Magic Chef, Frigidaire, Roper, Maytag, Jenn Air, Tappan, and many more.
This part is relatively simple to change and requires only a couple of hand tools to do the job, such as a Phillips screwdriver, a pair of wire strippers, and maybe a 1/4 - 5/16 " open or box end wrench, and about 15-30 minutes of your time.