Toyota has bungled what could be a very nice cars with a few foolish decisions. When I buy from an automaker I expect them to deliver a car, not a nanny. The seatbelt chime should give 4 or 5 dings should I choose to unbuckle for whatever reason. Instead it offers 1 ding per second for about 30 seconds & then switches tempo to 3 dings per second for at least another 30. Unnecessary. By the way geniuses, that's my briefcase in the passenger seat, not a person. Idiots! Then there's the fresh air/recirc HVAC control. When I make an adjustment, it's for a reason. Toyota thinks they need to 'automatically' switch to fresh air after about 5 minutes. Not cool. I rented this car, no purchase plans.
Comfortable seats. Relatively quiet cabin below 90. Excellent handling and brakes even when cruising above 110mph. Thoughtful interior designs and intuitive controls. Decent handling coupled with an excellent ride. Surprising performance for an inline 4. Good headlights. Large trunk. Fog lights provide useful additional illumination up close. The 130mph top speed is decent, in spite of the fact that the car comes with V rated tires. They bring the limit very smoothly so it doesn't feel like a governor but you get 130 whether going up a small grade or downhill with a tailwind. Slick, but like the seat belt nanny, unnecessary.
Adjust the seat belt chime and recirc control to something more respectful of the pilot in command. Sometimes it's necessary to grab something from the back seat. I don't need all the nonsense noise. Improve the fuel economy. Even when driving this car reasonably and always under 78mph I never achieved more than 26.6 mpg. When most of the tank was emptied at speeds above 95 it would drop to 22-24mpg depending on terrain & wind. With just city driving it was around 24. If you drive these speeds & can tolerate the nanny features then get the V6. This review was conducted over a 3000 mile cross country rental with purchase of a new Camry under consideration.
You can over-ride the recirculate feature that turns it back to fresh air.
By the way, losts of cars do that.
It stays on recirculate for a long time in the summer, most of the time never turns back to fresh, but very short in winter - it is a safety feature to prevent the windows from fogging over.
If they did not have that feature, someone would try to sue them!!
To keep it on and prevent from going back to fresh, just push and hold the button down for 5 seconds (but not in the defost mode (either of the windshield settings).
It will stay on recirc. until you shut the car off or switch into the defrost vent settings.
There - one of your problems solved.
Your briefcase must be very heavy - again, that's a safety feature - it is thinking that there is a person sitting there that should have the seat belt buckled.
To correct, just fasten the passenger seat belt or move your briefcase to another location.