As you can see from my Avatar I'm not a Cali owner but my signature gives a lot away. I've been a avid VW owner for forty eight years and in the past twelve have owned four new or ex-demo Transporters that I have built into campers.
Most have had various niggling faults from a faulty Eberspacher (water version) on a T4 through many leaking sliding windows on T5s, a failed EGR valve and leaking rear door seal on the current vehicle. Plus a failed blower motor in the Eberspacher again on the current vehicle and failed water pump on a previous one, the latter two items being attributable to conversion parts not original VW parts.
None of this has put me off looking for a T6 for my next conversion, I read on other Motor Home forums about the faults that occur on new Motor Homes of all makes and sizes and can assure you that VW are probably one of the least troublesome especially in the base vehicle.
If anything lets the VW Marque down it is the dealer network but by no means all dealers, I have no problems with my local Van Centre at Shrewsbury but don't know how they respond to Cali specific problems, if anyone has experience of them Cali wise I would like to hear it.
Rod