An informational post and rant I have an 2006 X-3 with an extended warranty. It has about 35K on the odometer. I try to drive it 1-2X a week. When I do not drive it for over a week I put a trickle charger on it (1 AMP). The vehicle has not given me any problems other than a battery failure last year 3,000 miles back. The dealer was pleasant at the time stating that the battery was covered under warranty and promptly replaced it. Its been starting fine up until last week when I noticed that the battery was dead (eye=black) again. I went to the dealer this morning and they said something was draining the battery - looking at my telephone cigarette ligher charger (which I do not leave in the car) blaming that for my problems and stating that I would have to buy a new battery ($200) and install of said battery ($100 and change) and the replacement battery was not covered. Consumer Guide'sÃƒÆ’Ã†â€™ÃƒÂ¢Ã¢â€šÂ¬Ã…Â¡ÃƒÆ’Ã¢â‚¬Å¡Ãƒâ€šÃ‚Â® Auto Editors have scoured repair bulletins and questioned mechanics to search for commonly occurring problems for a particular vehicle. In some cases we also give possible manufacturer-suggested solutions. In many instances these trouble spots are Technical Service Bulletins posted by the manufacturer, however, we have our own expert looking at additional vehicle problems." "Battery: The battery may die overnight if the key is left in the ignition on vehicles with electronic immobilizer system. (2004-06)" Vehicle is always in the garage and I never leave the key in the ignition. "Battery: Battery can die after parked for 3-4 days most likely due to problem in general module (body control module). (2004)" My X-3 is a 2006 "Electrical problem: The transmission may intermittently revert to fail-safe mode due to multiplexing problem requiring reprogramming. (2005-06)" I can answer this question for my X-3 "Engine noise: Engine may ping under light load, idle too high or stumble on acceleration until warm requiring ECM reprogramming. (2005-07)" Never hear the engine ping on my X-3 "Engine stalling: The engine may run rough or miss (the check engine light may also come on) due to problems with the original ignition coils and the carmaker is replacing them with Bosch coils. (2004 and prior)" My 2006 X-3 runs great with no issues. "Engine temperature: Engine may lose power at high altitudes (over 5,000 ft.) during hot weather due to vapor lock inside the fuel pump. (2004)" My 2006 X-3 resides in the midwest. "Headlights: Automatic headlights may not go off when exiting a tunnel or parking garage due to miscommunication between rain sensor and headlight module. (2005-06)" Never noticed this on my X-3 - but never really checked. "Information stickers/paperwork: When the outside temperature drops below freezing (32F) the telematics control unit may malfunction and emergency "SOS" calls will not go through. The battery may also be drained. To make sure the recall was performed, look for the sticker on the door frame. (2004)" I have a 2006 X-3 "Sunroof/moonroof: The sunroof may not close in hot weather or after being parked in direct sunlight because the channels expand and get tight and the anti-trap sensors stop the motor. (2003-04) " I have a 2006 X-3 After a couple of weeks had a dialog with BMW Customer relations. The customer relations diagnostics were the same as the BMW Service center. That was related to my driving of the vehicle. Conclusions: 1 - The problem still exists and the battery I purchased will most likely fail again. (trickle charger or not). 2 - Bring vehicle to a non BMW non service center certified BMW mechanic to diagnose parasitic drain. 2 - filing a formal complaint with the State's Attorney Generals office. Question: Is there a DIY way to measure any parasitic drains?