Why do my rear breaks make a grinding high rubbing sound? on 2008 Mazda Mazda5

When in reverse only the rear breaks make a hard grinding rubbing noise. The dealers says breaks ok. But still not acceptable. Mileage 85000 km. 4years same brakes

by in Eastport, ME on January 06, 2013
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1 answer 1 comment
ANSWER by , January 06, 2013
How many miles (km) since it was last checked? Hard for us to argue with a dealer that can look at the vehicle!
COMMENT by , January 06, 2013
78000 also rubbing noise rubber on rubber almost like the brakes are sticking on