The defective car parts issue reminds me of why I no longer go to a nearby service station. I'd been going there for years for oil changes and the like. A few years ago, the truck was dribbling coolant due to a faulty water pump, and the service station is just close enough to drive there. They replaced the water pump, and all was fine. For 18 months.Then the new pump started dribbling.
Day one: I drive to the station in the morning. They are a bit busy, so it takes an hour or two for them to get to my truck, and see that it is indeed the water pump. The station guarantees their work for only 3 months, but the parts supplier should have a longer warranty -- if they can figure out which of their three suppliers sold them the part. That took another hour or two, by which time it is too late for me to catch a bus to work. Good news though, the new pump will be covered for both parts and labor, but they won't be able to get the pump to the station until late afternoon. Good thing I have plenty of annual leave.
Day two: I get up early and catch the bus (hour and a half bus/subway ride versus 20 minutes driving). Coming home, I catch a ride with a friend and show up at the service station. Service manager looks nervous, and takes me into the no-mans land of the repair area to talk with the repairman. It seems that after he replaced the water pump, he took the truck for a test drive. Good thing, because the replacement water pump blew apart, destoying the fan, which in turn dug a hole in the radiator.
Now, I was getting a new fan and radiator to go with yet another water pump. None of which they had received, so they didn't know when the truck would be fixed. At least, I wouldn't be paying anything.
Day three: I walk up to the service station, to see what the latest news was, and just for general harassment purposes. Station manager wasn't confident that the truck would be fixed that day. I had him drive me over to a car rental place, so that I could get some working wheels.
Day four: That afternoon, the truck is finally fixed. Rental car is turned in; truck is picked up.
I can't fault the service station itself, aside from maybe not paying for that rental car. But I don't want to go back, in case they are still getting parts from that supplier.