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Old 08-03-2010, 11:46 AM   #5
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Join Date: Nov 2006
Location: Cucamonga CA
Posts: 3,687
Originally Posted by sasha055
Now I'm freaked out

Can it be from rotors? or from a wheel bearing going bad? (my left rear wheel bearing is waiting to be replaced)

Also if it's a stuck piston how do I fix it?

Yep. Bad bearings or rotors could cause it too. If you are hard on the rotors you will get a nasty grinding sound under braking. A sticky caliper can be rebuilt or replaced. Time to get some experienced eyes in there to have a look.
2009 Cayman 2.9L PDK (with a few tweaks)
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