13th Jun 2016, 08:15
Actually, I'm finding that the dealers in many countries are the last to know. Dealers usually only deal with cars when they're fairly new or under warranty; often common problems which are more to do with long-term design faults come out well after that period and people have been taking their cars to independent garages which are cheaper. The dealer may deal with the odd one or so past warranty, but independent garages usually are the ones who encounter these en mass.
13th Jun 2016, 19:35
As complex as cars are, and I have a family member with a shop, it's not so black and white. Modern cars have many complex components. Some are intermittent. I recall one in which a car would not start. The owner cut a duplicate key without a chip and tried to start the car. It shut it down. It was immobile and totally a key issue. They neglected to share what they had done. I had a somewhat similar situation when a hidden kill switch was hit. Bought a car and the owner neglected to indicate there was one present I replaced 2 starters before tracing that issue. We had a Viper immobilized with an aftermarket anti theft system as if the factory one was not enough. It takes time to trace and diagnose many modern car issues. Some seem simple, but are not that clear.