NHTSA Complaint #11446265 — 2019 TESLA MODEL S

driving down the road on a 25 degree day. i turned on the front defroster and the entire windshield cracked across the entire windshield. i've heard of other tesla owners having the same problem. cheap untested glass. all teslas need new glass. two weeks later i was driving on a 20 degree day, turned on the rear defrost and the entire rear glass cracked. zero chance that either of these problems were cause by external issues. both occured on sunny days with no other traffic anywhere near me. purely poor material and poor engineering and/or inadequate testing.