Remember, the car may have a relatively new engine and trans. but not only does the rest of the car have 160K miles on it but all components that suffer during driving, i.e., suspension, rear end, etc. have 160k hard miles on them.
The suspension bushings may be new but the 'A' arms, shocks, springs, steering linkages, ball joints, etc. have probably all taken a tremendous beating. Take the car to a good front end alighment place and get it checked. The arms may be bent to such an extent that the car may be right at the limits of alignemt adjustment. Remember, that if you have to replace one are the others are not far behind it. Could be in for big bucks.