We are a Vw/Audi shop, and the local Volkswagen dealer has told a few of our customers that we have sent to them for recalls that we have no business working on their car, that we are not certified to performed the work that her car needs,blah,blah,blah. (My partner and I were the top techs there for over 5 years) All they have done is lost customers for good. When a business speaks poorly of another business i think it makes them look unprofessional but alot of them will still do it.