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I have a 2015 optima eco hybrid with a distinct brake noise at the abs booster/ master cylinder I am also an ase certified gm tech of 30 years. I just took my kia in to the dealer asking the to diagnose the noise when I depress the brake pedal. I got the vehicle back he tech said he lubbed the pivot bushing and push rod and said noise was gone and that it is a normal noise due to wear, but nope it wasn't gone. So I did some looking and found a bulitien for the same noise on 2011-13 Optimas to chanr the brake line which the updated part has a dampner in the line. My question is , has anyone found any other bulitiens apply to 2015. Oh an my car ha 39,000.
Thanks.
Thanks.