[dsfyu404ed]

Plastics and rubbers degrade over time.

For example, rear and side window motors tend to fail first because the mechanical components are used the least, become more full of dust, the rubber tracks harden, motors work harder and burn out.

The garage will help a lot but when a vehicle is on the road for 10-20yr issues specific to it's service that can't easily be foreseen or simulated in tested pop up.