If any work was done after the accident to the chassis or any steering or suspension mountings then get off your butt and kick butt at the repairer - you will soon replace tyres at your cost like this .
If nothing major was done then have 4 wheel alignment done , this will show any defects and correct the misalignment .
The 540i is a heavy car and a suspension bush may have worn as well , the alignment technician should pick this up , he should do a test drive as well .
Good luck .