We have a 2012 X-3 that was purchased new. Just put a very expensive dealer installed battery. We were getting low battery message on dash. Dealer recommended also a BMW battery charger. I will keep the charger on until the green light turns solid steady light. I unhooked the charger took a 38 mile trip at 65MPH. Put the car back in my heated garage, and reconnected the battery charger. To my surprise, the red light came back on meaning the battery was only 80 percent charged. It took another six hours of charging to get the steady green light. The dealer says this is normal. Sounds to me this low mileage car is not charging. Has anyone had this problem?