MCIVSTX
Member
I got to compare my friends 2021 M3P with my 2018 M3LR and if your expecting a night and day difference in build quality your gonna be disappointed. Both cars exhibit minor defects like panels, door handles, and doors being slightly misaligned. Rattles are on par with each other though the double paned glass seems to insulate the cabin a bit better. I would say the 2021s are definitely refined but i'm in no hurry to trade in.