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1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

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Old 09-13-2010, 10:29 AM   #1 (permalink)
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Angry 2004 745LI Malfunction

Yes, Wassup BMW Nation. I'm hoping someone has ran into the same problem that i am having now to post some positive feedback. Recently my car was idling after being driven for a while, and upon entering my vehicle, i receieved a onboard message saying transmission malfunction/drive slowly warning. All the warning lights on the inside of car were on, and the Monitor screen as well was blinking on and off, along with the A.C. Unit blowing slow air. I turned the car off for a min and tried to restart and all i got was a clicking noise as if the alternator was bad or something. Everytime i press start it would just click like there's a battery or alternator problem. Waited till morning, car started fine so i drove it to shop. Technicians didn't find anything on their computer system. So i drove car for about 1wk 1/2 and same thing happened again and whatever it is, i throws the car in like some safe mode that won't allow u to get out of first gear, and again, lights and everything inside started blinking crazy and A.C. blows slow. I let it sit overnite and next day it started fine and drove fine for a wk. Any suggestions what this might be. Transimission shifts through all gears fine and technicians says trany is good, no signs of slipping or malfunction. Could there be something else that triggers this car not to operate properly. I also experiencing a slow hesitation start off and on, after holding brake pedal and pressing start button. Please give feedback...someone!!!!
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Old 09-15-2010, 08:38 AM   #2 (permalink)
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If it happens again, try disconnecting the battery for 20 minutes and the reconnect it to see if it continues with the problem or if its ok, if its ok then the problem looks like it is more to do the Engine Management side, if it doesn't come good, and needs to cool down, it could be something more mechnical, but possibly still electrical in nature.
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Old 01-05-2014, 12:54 PM   #3 (permalink)
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I'm having this very same problem and more. This is on a 2004 745LI. It's been ongoing too for a couple of years. Don't drive the care very much and it seems the battery dies often. I understand low voltages screw up info on sensors. First problem with low voltage was rheostat blows low air on the AC only. Battery died and changed and took it to a BMW dealer. They said change the rheostat. When I picked it up that night, still had the same problem. They then said that the computer didn't have the right code for the type battery that had been installed by a non BMW dealer but they supposedly specialized in German cars and highly recommended. Dealer input proper code and rheostat worked properly. I don't think they actually changed the rheostat. After returning to the German car specialist again for computer code corrections, the battery has lasted the longest time setting 6 weeks with occasional starts, no driving. Now the battery seems weak again and after charging the battery, error codes came on but after turning the car off and on again, error codes went away but returned after a few minutes. Same errors as above and also parking brake default and dynamic drive inactive. Previously, front passenger window would not lower but the other three windows worked fine. Window that wouldn't work had a motor and something else changed by a BMW dealer mechanic that had his own side business. Worked short period of time then quit. Also automatic door closing does not work, all windows started going down but wouldn't go up unless you kind of tapped the buttons one or two times and then it would eventually go up all the way. Using the remote to lock the car worked for all doors except drivers door and if held down long enough, the rear passenger window would begin to lower. The next morning after the recharged battery had been reinstalled the day before, gave the same results as above and the clicking noise was heard as if the battery has been discharged with very low voltage. That was yesterday. I haven't checked to see if there is still a charge on the battery. Any of this ring a bell with anyone? Thanks in advance for any input.
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