Product review (5 stars): Save lots of money vs. service call!
Buy this kit, watch YouTube videos, install it yourself in just a few minutes for a lot less $$$ than a service call and parts.  You will need a "star head" screwdriver or set with interchangeable bits or star head key set (like hex keys, but star shapes).  If needed, you can easily get a star head set for $10 or less.