AJ 
2014 BMW 3 Series Diesel 328d 4dr Sedan (2.0L 4cyl Turbodiesel 8A)
Reliable, efficient, fun to drive BMW 328d
 I've done a lot of research on Mercedes/Audi/BMW diesels before I bought my 328d: if you pick up a copy of Consumer Reports magazine (or subscribe online), you'll learn that 2014 BMW 3 series earned an average of 4 star (above average) reliability ratings in every area (mechanical, electrical, etc.), better than any other year; other 3 series have average reliability and most 7 series and 5 series score below average reliability. These BMW 328d have very few mechanical issues unlike 2009-2011 335d, which were known for expensive fuel injector/pump, carbon buildup and DEF/EGR problems. I fill up with Propel HPR diesel, a 100% renewable diesel (way better than bio-diesel) available in most cities in CA, which will help keep this 328d very reliable for many years (look up HPR diesel online, I tested it on my TDI before, it's a superb clean diesel alternative). Fuel economy is way better than EPA rating at cruising speed - I get 52-54 mpg at 73-75 mph, (high 50's! when cruising at 55-65 mph) - I average 39-44 on each tank (600+ miles) depending on what % is city driving & how aggressively I drive - that's the fuel economy of a Toyota hybrid. Considering the great handling and how much fun it is to drive (280 lb. ft. of torque), this BMW is a winner! I bought my 328d certified pre-owned from BMW of Marin County with an extended warranty (2 years, unlimited miles) which gives me a peace of mind as I drive 3K/month all over NorCal. The 8 speed ZF transmission is smooth and quick shifting in either sport or comfort mode: I've owned many BMW's with 5 & 6 speed transmission and this 8 speed is the best. Interestingly enough, I searched for 328d for 3 months and paid less for very clean low mileage Certified 328d than private parties were asking, which shows how high the demand is for these reliable diesels. If you find one with a clean title & well maintained - buy it - you won't regret owning it. Here's a nice review from Motorweek - http://www.motorweek.org/reviews/road_tests/2014_bmw_328d