As long as your warranty clause covers electronic items such as actuators you should be okay. Most extended warranties are very picky about those though, so I would check.
I had my extended warranty replace the $500 lumbar motor (turns out the motor was good, the lumbar bracket was bound up... oops? I got an extra motor out of it and an 1.0hr pay!

) in my seat because it was covered under seat mechanism and motors.
Also that is odd, I rarely have Toyota locks fail, seems like its starting to crop up more often though.