It really depends on what's wrong. If it's just simple then you may want to fix it, if your lazer or some other expensive part breaks, you may just want to buy a new one.
car cd changers are normally mounted in either the trunk or the glove compartment
Car CD changers will often come with installation instructions if it is purchased new. If the CD changer is already installed in the car, there probably will not be instructions.
You can find aftermarket CD Changers that fit your car at http://www.crutchfield.com . Their fit selector will help you determine what CD changers/kits will fit. Another reputable site is http://www.sonicelectronix.com .
Pioneer is the leader in CD changers, and all their products are very well regarded.
Pioneer is probably one of the most trusted brands of car cd changers.
The largest home cd changers can handle 100 cds.The largest Car Changers only handle a dozen usually.
Bose Wave music system Multi-CD Changer is one of the smoothest shuffling car CD changers.
The Pioneer Car CDXP680 6-Disc Capacity Multi CD Changer comes with a remote control.
The 5960 is compatible.
They will do more damage over time because they move the cd back and forth into the CD Player.
For the most part, car CD changers will be obsolete, because many car stereo systems now come with MP3 players built in, so many people will not even need a MP3 player to hear MP3s in their car.
Car CD changers are very easy to install, provided all the wiring has been hooked up to the trunk where the changer will go.