general problems of the 2006 Infiniti M45

This car cannot keep a straight line on any road. I have had all four tires replaced, all four wheels replaced, five tire alignments/balances done to no avail. This has caused severe danger when driving on both one and two lane roads, as the car will suddenly move into other lanes. Has caused another car to go off the road to avoid my car hitting theirs causing damage and injury to that person. I, as well as other complainants on here, have been told that Infiniti is aware that there is a defect in the steering rack but is not authorizing dealers to repair or replace under warranty. This issue effects all Infiniti m35s and M45s from 2006-2010. Class action lawsuit is in progress.