My brakes were acting weird. When I took the front apart it had a sized caliper pin. I freed and greased it. This seal fell out when I pulled the pad out. I ordered a seal kit. Can I put this new seal in without disassembling the caliper?

 

That one, yes. It’s the dust boot, not the piston seal.

 

Looks like only half of the dust seal broke off. I couldn't get what remains out. It kept falling apart. I'll have to take it apart. That will be a first for me. It's weird, the caliper is less than 2 years old. I wonder if it had anything to do with the seized slider. I know I must have knocked the rubber boot off the slider when I installed.

 

If you're tracking the car, leave the dust boots off, you'll only continue to destroy them. If it's not, it's most likely just a cheap caliper rebuild, and two years is actually a lot of life out of a reman'd caliper.

 

I didn't realize remanufactured calipers had such a short life span. My oem ones lasted 20 years! In looking at it, it doesn't look terribly difficult to rebuild these. I'll do it soon. For now I'm just running it with half a dust seal. Thanks for your help.

 

Replacing the piston seal is the easiest part.
Taking the piston out can be a bit harder, as it might require air pressure to pop it out.

Actually I always find the dust boot is the most tedious part to put on cleanly, But all in all, the whole process is relatively easy, though most easily done on the work bench.
In the mean time you can indeed run it for a while with half a dust seal.