Hi sorry to open up another thread about this, got a quick few qs. Got my 2009 A3 booked in for the balance shaft and hex key to be replaced. I just wanted to confirm whether KMB parts is the best place to source this? As my mechanic said he can supply it for £175... The warranty with KMB is 2 years but worse case scenario it did fail, wouldnt it damage other parts as well? If so whats the point of the warranty? Is there any other problems with this model? I Just want to do all preventative work and therefore no longer be paranoid How many hours labour will this be? Thanks.