This BMW CM5903L radio stereo is perfect for anyone looking to upgrade their car's sound system. It fits in various models such as E31, E32, E34, E36, 318, 325, M3, M5, 525, 540, and 840. This cassette and CD changer controls stereo has a one-year warranty. It is manufactured by Alpine, a well-known brand in the industry. With its custom bundle feature, you can customize your car's sound system to your liking.