2002 BMW 540i Questions

All 2002 BMW 540i Questions

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My 2002 540i has 140K miles and have had it 4 years. It recently shut down on me and a place in Kennesaw, GA specializing in BMW's indicated the coolant sensor broke and leaked fluid into the harness wires, control h...
It seems to only do this when I have the doors locked. My battery had been dead but I recently had it recharged.
The cruise control light will come on but does not stay on.
Presumably the cooling fan under hood on passenger side fails to turn off after 1 hour when ignition is turned off blowing air into car under both driver and passenger front seats. Needed to disconnect battery.
Driving to work and for the first time a warning allert came on saying transmission in safe mode operation and driving became sluggiss and seemed trans would hardly move vehicle.Then radio went off, battery indicator ...
Air conditioniing cooling very slow ly. Does it need recharging or something expensive ? Thank you, George gdcastro@comcast.net
Hello all. Does anyone have and idea what it means when the service Engine Soon light comes on. I have changed out the spark plugs and oil.
I had a mini diagonis check it said, mis-fire on one cylinder. I replaced the spark plugs and cleaned the coils but the problem is remains.