Мягко говоря ВОТ!
6. Can I change my Bose sound system?
a. Can I add a CD player or changer?
Yes, in most cases. When Bose works with a car company to design a sound system, we almost always include provisions for adding CD capability. To learn which CD players or changers will work best, contact your vehicle dealer. If you're not sure whether your car has the option of adding a CD player or changer, contact automotive for more information.
b. Can I add a new radio?
No. Each Bose automotive sound system is completely integrated, with the elements custom-engineered to work together as a whole. That's why the music sounds so rich and lifelike. To help achieve this sound quality, special circuits are built into the system, including the radio. If you install a new radio, you lose these circuits. This can result in decreased sound quality, incorrect bass and treble balance, distortion at high volumes, loss of bass at low volumes and in some cases, no audio output at all. In addition, changing the display, which is also known as a headunit, will void the warranty on your Bose sound system.
c. Can I add a subwoofer?
No. As noted above, each Bose automotive sound system is completely integrated, with the elements custom-engineered to work together as a whole. If you add a subwoofer to the system, its output is unlikely to be proportionate with that of speakers already in place. In most cases, adding a subwoofer will detract from—not enhance—the sound quality.
Хочешь еще почитай тут
http://www.bose.com/controller?event=VI ... 5&x=9&y=11
тут я как погляжу много.