MOLDS ARE MADE OF TOUGH RESIN MATERIAL..THERE ARE NO OBDII MOLDS MADE TO ONLY USE FOR 5000 UNITS.. THEY LAST MILLIONS OF UNITS ..NOW IF ITS A STEEL MOLD FOR STAMPING THOSE CAN OBV WEAR OUT AT SOME POINT.. BUT THESE ARE RESIN PLASTIC.. SO ONE MOLD SHOULD LAST ALMOST INDEFINITELY.. UNLESS IT GETS DAMAGED BY A CARELESS WORKER OR CEO..