"Minor facelift" typically refers to a cosmetic procedure that only makes small improvements or changes in a person's appearance, particularly to the face. Full definition
[citation needed] The revamped interior featured completely new door panels and seats, while the dashboard and radio face only received minor facelifts. (en.wikipedia.org)
The Renault Duster, which was launched in the summer of 2012, has had its share of minor facelifts in the past, but now it has gone a step further and got itself even an additional transmission. (rediff.com)
However, Wikipedia also mentions that there were minor facelifts on 1999.5 and 2001 models. (mechanics.stackexchange.com)