How long is too long to leave a car parked?
How long is too long to leave a car parked? Typically, your car can sit about four weeks to two months without driving before the battery dies. The reason your car can sit only for so long before it dies is the fact that your car battery is in use even when you're not behind the wheel.
Is it bad to let a car sit for 3 days?
If it is a newer car, this simply doesn't matter. If your car is less than 3 years old you can leave it alone as long as you want and the only thing you might have do deal with is a dead battery requiring a jump start. Of course, your car would be better off after the three years if it was driven periodically.