2001 BMW 325i Questions

All 2001 BMW 325i Questions

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My battery died last week when it was really cold. I charged it up and 5 days later it died again. How do I tell if it is the alternator or ecu?
I get errors that bulbs are out and they are not thermostat is not reading correctly at times. My mileage indicators are only half way visible sometimes pushing the glass in will show them all. Any help will be apprec...
at night it didnt crank drove about about 2 hours to another city came out of the house and it wouldnt crank but for a little while
I'm trying to find out my bmw will be due in copple months. anyone has an idea?
Going up hill the engine is sludges no power , also notice my housing for the thermostat hose is sucked in ( like if some one squeezed it ) after car gets cold
the circle is round with yellow marks around it
converter glows red any ideas to get it to a shop for further diagnosis
gives me these codes need to know hoe to fix
worked fine when put up for winter. the key still works lock system. someone told me it could be my alarm system
At times the engine will start and run rough then die and then crank and no start, leave vehicle and let sit then will start and run great, not every morning yet not knowing if it will start is a bit nerve wrecking, a...
I have oil leak betwen engen and gearbox its comming from gearbox <auto gearbox>
this happened 3 times already and it appears to be the same type of fuel line that was on it when i bought it. this last time it only lasted about 130 miles which was about 2 days
The car wouldnt hardly go after the light came on. It was like it was going to chock down. Rpms was up to like 5 and still was not going like it should.
When I was checking the radiator I found oil in the water. I checked and sure enough it appears as if the engine is venting oil into the radiator from someplace. Any ideas? A friend suggested it my be an oil cooler g...