Replacing parts does not lower the products standards. It is the same unit even enhanced and improved with something new. It can be comparable to a turkey filled with stuffing for Thanksgiving. It is the same fowl animal with something better inside. The outer covering remains the same despite changes inside.
Periodically clean the interiors of the machine with water, baking soda (half cup) and white vinegar (3 cups). Run the machine without load after filling water with the above substances. All residues and deposits formed inside will be removed. If necessary consult the company representative about the preventive maintenance. In the case of new machines make use of the free maintenance service offered by the manufacturers. Remember the adage "prevention is better than cure".