Bought B/N 2010 Adventure last January 2011. Drove it for 9K. Last week got a flat front tire. Service it myself.

One of stud nut broken in two when I tried loosen it. Went to Mitsubishi Service Center. They made me pay 1,200. They said it is not included in the warranty.

The nut has the looks it is already broken for a long time.

What to do? Where can I file a complaint?