That is a mains interference suppressor, by the terminal block. It doesn't appear to be on the parts listing, so an email to firstname.lastname@example.org
to identify the replacement. Odd that the wiring appears to have chafed in a static installation. The scorch marks will be grease escaping and is fairly typical.
From the front, on the l/h side of the main oven box, there is a single shot thermal cut-out which may have tripped. Question then would be why?
The 273 on the timer I can't help you with......