My brother had a Jeep Patriot, which I believe was built on the same platform as the Caliber. It was a complete POS and was pretty much ready for the crusher at less than 70k. He didn't mistreat it either. He just drove it to work, and was constantly polishing that turd.
The CVT started acting up at around 40k. The dealer claimed that there was nothing wrong with it, despite it suddenly going up to 6k RPMs and accelerating poorly while at wide open throttle. The CVT went out completely at around 60k. The dealer told him too bad, so sad, even though he bought the extended warranty.
Most of the front suspension components had worn out and were replaced in that time, too. And, on top of all that, by the time it was 5 or 6 years old, the body was already starting to rot out.