Turn off the electrical power to your Bosch DHX series dishwasher from your kitchen circuit breaker.
Open the dishwasher door and locate the black rubber door seal along the edges of the front frame of the dishwasher.
Remove the retention screws holding the door seal to the frame using a Phillips screwdriver.
Insert a putty knife or flat head screwdriver along the inside of the door seal to pry it out. Work the putty knife around the from to lift out all of the seal.
Place the new seal into the grooves where the old door seal was. Push the seal in using your thumbs.
Close the dishwasher door and turn the electrical power back on from the kitchen circuit breaker.