As a result of the brake pedal causing a metallic squeaking when depressed, even when the car is stopped, I took it to the dealer for diagnosis. I am the original owner, it has 88,000 miles. No prior brake problems. Recommendation was to replace the pump assembly AND charging for a brake master cylinder A21 repair kit.. Based on what I've seen in the forum I don't understand why the master cylinder kit - goes for $781.56 would be required. Anyone come across this or are they just padding the repair work?