m_n 
2001 BMW 3 Series Sedan 330i Rwd 4dr Sedan (3.0L 6cyl 5M)
Love/Hate
 Outstanding performance.5 minutes into a drive you understand why Car and Driver has put it on their 10 best list for 22 consecutive years.Love love love the way it drives.But it is the 2nd most unreliable vehicle I've owned, next to a Mercedes E320. Water pump, vanos unit, idler pulley exploded on me, this sensor goes bad, that sensor goes bad, constant check engine lights, power steering leaks, and on, and on.And it eats rear tires. The only saving grace is this car is very easy to work on for an average mechanic.Yes, it really is.I replaced the water pump in 1 hour and I have never replaced a water pump before. Non-dealer parts for non-M cars are reasonably priced too.