Its more then likely your brakes. Wheather its good or bad, idk. If you just drove thru a puddle i'd say you're fine but if its been happening for awhile i'd say your brakes are dragging or hung up a bit. A lot of times if you dont lubricate the metal clips that actually hold the brake pads in place, they can rust out and make it difficult for the pad to retract off the rotor.
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