lemonhead99

Having the brake booster symptoms on my 2011 SEL. Called dealer. they looked at it and said it was a "brake booster valve" not the booster itself, and said that wasn't covered. Cost 44.00 for the part and 220.00 for labor. Got the car back and it still has the hissing noise. Is there any way I can prove its the booster itself? What test do they do for knowing if a booster is bad? I'm extremely unhappy. Thanks!!