My 2003 BMW 325i blower fan has a mind of its own. When the car is turned off the fan keeps running. Sometimes all night long? I have a similar problem as well. For some reason the blower on my 02 BMW 325i runs intermittent as well. Turn it on low it blows properly then high then low etc.. Even as you state it keeps running even after the key is switched off???? Any advise from anyone else having the same problems.....

Do you mean the inside fan? if so it is the "fan resistor". Can order from autopartswarehouse.com or similar.

my friend owned this car and it got hot and he warped the head and the car was ruined... you should get it looked at right away. make sure the radiator fan is working .. check the fuses.... sometimes when you put the car on max a/c this will automatically turn the fans on.

there is a resistor that needs replacing. It's located inside the car, under the dashboard, near the steering column. If you don't replace, it could run your battery down, as the fan/blower will operate when the car is left.

the blower fan on my BMW 530 does not work

Had my blower replaced last year, but my heat does not work. I can turn it up to 91 degrees and it is barely warm. Help please.

if it was me and did not have any problems with the one i have now i would keep the one i have this is what i do before i change cars i get on www.autozone.com and checkout the price different to see if the new car is going to cost me more in parts like a alternator and i wish you the best Michigan Man.

HI, i have a 2000 323i and it sounds like we have a similar problem. my a/c works fine when the blower is going but some times it goes out of control and it's almost like it has a mind of it's own. and sometimes i turn off the car and the blower keeps blowing air even if the car is completely off and the keys are out.
I'm replacing the blower resistor to fix that. i was at the delaer today and spoke to a mechanic and its a common problem on the final stage blower resistor. you have to reach the blower to replace it but its easyer that it sounds.

Good luck

You need a final stage resistor located under dash on passenger side - toward transmission tunnel/ center console. This controls fan speed and is very comon.

The problem would be what BMW calls the Final Stage Unit and parts house calls them Blower Resistor. Not sure why BMW and parts store calls them different.

Check out this BMW DIY post thats describes in detail the problem and how to fix it. Looking at about 80 bucks for the part.

http://www.bimmerfest.com/forums/showthread.php?t=143393

Awesome post. Saved me a lot of time and money!!!!

it's either a fuse or it's a bad blower motor, it could be a bad blower motor resistor but usually you'll get either high or low only, so if you have nothing on any speed, high low etc, and all the fuses are ok chances are it's your blower motor.