It is most likely that the cars brakes are bad.
Squeak in tires (when turning in particular) could mean low tire pressure, or bald tires.
They could squeak, rattle, bang , clunk.....
You can make anything into a convertible, but you lose structural rigidity. Essentially, the car will flex, squeak, rattle, and drive even worse than it already does.
rattle (car noise) = nekisha (נקישה)
ball joints
grease needs to be applied behind the rattle clip before rattle clip is put back on..need more info contact glennschevygirl@yahoo.com
If you don't regularly use the a/c the compressor loses lubricant and will let you know it. If you use it for 20 minutes it should settle down and be squeak free - if not take it to someone to recharge with freon.
The car may need new brakes or tires because they might be wearing down.
A rattle, or rattles.
The wheel bearing.
The little mouse under the pedal
Shocks have gone bad ( dried out seals ) or spring shackles loose. have someone bounce the rear of the car while you look under to narrow down the source of the squeak.