Auto Express's running costs ratings are based on our Driver Power survey of over 30,000 car owners. Ratings are the average for all owners of this car who responded. Individual owners’ ratings and comments appear below.
2011-reg Diesel, Owner for less than a year

Pretty new therefore would expect reliability to be good. Fuel cheaper, tax cheaper, insurance cheaper than my old 3 series.

Cost: 5/5
2012-reg Diesel, Owner for less than a year

It's a bit too soon to say really – just 2 weeks old (but I am hoping for the best)! See above – the car is new.

Cost: 3/5
2012-reg Diesel, Owner for less than a year

No faults. Could be better on fuel, prior 320d did 47 mpg.

Cost: 3/5
2010-reg Diesel, Owner for 1 to 3 years

Faultless. Economy in keeping with manufacturer's claims.

Cost: 5/5