I guess I have a few questions. First of, when should any of the above be replaced if ever?

Reason I ask is that at the moment I get some sound from the brakes that isn't actually from the brakes/rotors rubbing put possibly related to the piston or the pins. When I depress the pedal at a somewhat slow speed, I get this almost "click" type sound and I think it's only at the front and maybe even only on one of the sides.

The car is 6 years old and I'm the 2nd owner, I'm doubtful that the piston seal and boot, and the sliding pin have ever been replaced.

Also, when I wash the car and leave it, it's almost like the brakes will seize up overnight. Maybe the sliding pins are just in need of some grease?

Any info would be great!

 

seals and boots only need to be replaced if they are torn.

the pin you can clean up. most likely is rusty and sticking. use brake cleaner to remove all grease and crud then you can get some 320-400 grit sand paper and spin the pin while wrapping the sand paper around it. you don't want to create flat spots so spin it. grease it back up using brake grease and resinall, it should be sliding freely now.

 

Thanks for the suggestion, I guess I will start with the simple stuff first and check the pin. I hope that's all it is. Don't feel like taking apart the caliper and all that stuff.