This is a common theme across all industries. Automotive, aeronautical, industrial, marine, consumer goods.
An OEM launches a new product, after possibly several years and millions apon millions of testing hrs/miles/cycles etc.
But still, problems don't show up until after the first year of in-sevice use by the customer. This is particularly true in the automotic world.
Is there a flaw with the way development is done, or the test and development regime. Or, is it it simply not possible to test in a real world way that simulates the experience of thousands of customers. It's not for want of trying though. car manufacturers spend millions of dollars flying prototypes all over the world looking for the worst conditions possible, GM for example did several million miles of testing, yet problems didn;t show up until the trucks were in the hands of customers for a year.
Here is an example