Original owner replaced with new lights cause both the left and right cracked. I bought the car from him, and the set he had installed were cracking, all 3 of them. I replaced all 3 with used from Bernie like I said in the original post. They've been on for under a year and they the center panel is now cracking.
The car has probably had under 100 miles on it for the year. It's been parked in a portable type inclosed garage most of the time. I didn't go crazy tightening them down either. Maybe uneven torque, but I wouldn't even think much about it sense its very light pressure.
