NHTSA Complaint #11430516 — 2010 MAZDA MAZDA6

I purchased this vehicle for my 16 yr old daughter 1 yr ago. The car has a clean carfax and has had no accidents. Upon purchasing the car the headlights continue to burn out. Taking it to a Mazda dealership i learned the headlight assembly unit was melting. I had to purchase 2 used headlight assembly because new from the dealership are 1,000 a piece. 2 used but perfectly working headlights were installed and within a yr the headlights had burned out again. I went to change the bulbs only to learn the headlight assembly were once again burnt. I have to purchase 2 new headlight assembly again but the mechanic can not guarantee that this burning situation won't occur. After calling around to places to find headlight assembly I have come to find out many are burnt. This seems like a real problem considering you need headlights to drive at night. Spending 1,000 everytime my headlights burn out seems 100% unreasonable and the fact that there is cleary a wiring issue within the headlight assembly unit itself seems to be a problem. I have been on multiple forums and this is a common issue. Please fix the problem!!!!!!