Thermostat seems to be stuck open. on 2003 BMW 330xi

How difficult is it to replace with a new thermostat? I have some mechanical ability but haven't worked on this car other than changing the oil and filter myself.

Asked by for the 2003 BMW 330xi
1 answer
all data says 1.5 hrs depending on your ability you might want to have it done by a pro. there is a bleeding procedure to extract all the air