What's the 2005 BMW 645Ci aux input location?

The 2005 BMW 645CI does not come installed with a working AUX input. Some owners have had luck with dealer enabled additions that can cost from $900-$1,000 in parts and installation. However, the 645CI is difficult to modify and aftermarket solutions for installing an AUX input are not common. Some owners purchase an Android and iPhone music interface adaptor that allows them to play music from a smart phone through the radio. The 645CI does, however, feature 8 total speakers, an AM/FM radio, a single CD player, 2 subwoofers and a leather steering wheel equipped with both Audio and cruise control buttons. It provides seating for up to 4, 325 HP and 15 mpg in the city and 23 mpg on the highway.