How often should brakes need to be serviced?  I have a 2012 imprezza and I've had the rear calipers replaced in 2013 at 11000 miles. Then my brakes were soft-- march of 2015 the brakes were bled and they installed a new master cylinder .  Brakes were soft again in November of 2015 the brakes were bled --at 33000 miles.  In march of 2016 the brakes were flushed and bled at 36000 miles.  Now -January 2017 my brakes are soft again.  I just don't understand why the dealer can't solve this problem.  When they do an inspection the brake pads still have wear and fluid is listed as fine. 

warranty work? if so, try another dealership.

 

if not, ask in a new thread for a shop near you - maybe someone can direct you to a good brake mechanic.

 

it would be nice to know if air is actually found in the system when they bleed it.