So, this is the first of many issues I’ve had with this car. This is my tenth BMW, and honestly I don’t know how I put up with so many of them. The coolant expansion tank started leaking so badly that it would drain all the coolant every 100 miles. My BMW dealer was not at all helpful because I’m, and I quote “young for a BMW and I’d need my parents to sign off on the repair.” I’m 20 years old.