Yes they should be interchangeable
Yes,they're widely available.JVC sells a model that plays mp3s,cds and cassette so you can play most of your collection on it.
you can replace your radio with any factory Nissan radio made from 1995 and earyler newer radios (96 -05) have a diffrent harness
a piece of equipment that contains both a radio and a cassette player
well i think you are talking about a e46, 99 model year or newer, do you not have volume in any mode? radio, or cd/cassette, if that is the case then you might have defective radio, no repair is made, you will have to replace it.
All cassette's are the same size no matter what car they are in. The radio surrounding the cassette may be a different size but not the cassette which is 4 "x 2" x .15".
Yes, it's a straight forward replacement. One in, one out.
Yes most portable cassette players get radio and also record as well
No. Nothing that has a cassette player in it is an antique. It's a new radio styled like an old one.
For Serious?
Yes, because you will be discarding your old radio anyway. If it were to have theft codes, they would be stored in the radio. Just toss your old radio, because it will be scrap. The theft code is usually in the radio itself - so if you buy a NEW CD/Radio or wahtever then if it does offer a theft code then you will have it. If you want to re-use the original radio , then you need to find its code and enter it to make it work.
The easiest way to get information from a cassette tape to a CD is to get a radio that has both a cassette player and a recordable CD. As the cassette plays it can be recorded onto the disc.
Yes, they all have radio as a part of the player.