Shouldn't this be warranty work?

Changed the front brake pads on my 2001 R/T, and now the master cylinder has to be replaced because a rubber valvle part in the master cylinder was damaged while I pushed the piston back to take the pads off.

I followed the procedures in the Haynes book to the letter, and it's the same thing I've done on 2 other cars while replacing the brakes. This car is still under warranty. Should the work to replace the master cylinder be covered under the warranty, even if I did the work? HELP!

This just keeps getting better and better... the dealer says it's not the master plunger valve, it's the ABS accumulator valves. That's where the air went to, and they have to bled out. The service tech is going to see if they'll let this go under the warranty. It strikes me as rather poor customer service if you do nothing wrong while working on your car, yet wind up with a $170 repair bill. I can't believe this car is wound up so tight that you can't even change out the brake pads yourself without screwing up the ABS. Guess I'll plan on having to pay for every little bit of upkeep on this car. I was planning on changing out the plugs and wires at 40,000 miles, but I really hesitate to consider doing that now.

With an ABS system, the BEST thing to do, is open the bleeder valve slightly when pushing the piston back in the caliper, then topping up the fluid level when finished. This method prevents any contamination and dirt that may have made it's way past the piston seal in the caliper from being pushed back into the ABS components.

I don't see how air got in there, as there should be no air in the system to get pushed back into the ABS system.

Why would you be replacing the plugs (there are no wires) at such a low mileage? I wouldn't even worry about them until about 60,000+!