I own the micra diesel for almost 3years now. Problems faced
A brake issue initially. Some noise was there but that was a manufacturing problem so on reporting the company had changed the whole set.
Mileage: never a 23 kmpl as claimed by the company. Don’t go by the digital mileage, it varies from10 to 30 kmpl. I have a full tank every time and then the total km run. Dividing I get the mileage which has constantly been from 10.5 to 12.5 kmpl. Note: my ac is always ON even in winters. And the drive is always in traffic and alleys.
No other problems. Very powerful engine. Very comfortable drive.