Not much, to be very honest. I have replaced the valve guide seals (under warranty). Just replaced the starter. I've probably done the brakes and tires at some point, but I cannot remember when and the dealer tells me that the ones I have are fine. Other than general maintenance, the car has been exceptional.
I received this car as a Christmas present, and it continues to shower me with the gift of peace of mind. This car has been perfect for my purposes, and has never left me stranded, never ran poorly, or made me worry about anything. Our anniversary just passed, and my husband offered to buy me a new Camry. I stated I was happy with this one, and lucky I did so. I was just involved in a collision in which a passive driver was not looking both ways and drove in front of me as I was crossing a busy intersection; the nose of my car did over $6000 in damage to his 1995 Honda Accord. My car? The front license plate fell off and I put some scratches on the front bumper. Other than that, nothing else. What a relief, and what a testimony to their solid structure. When another anniversary rolls around, maybe I will ask for a new model.
How surprising!
To be fair, anything is more enjoyable than a weekend at Disneyland!!