Unauthorized swerves due to rear end toe out at 170K miles on the probably original rear end parts.
Trickle charge at 2 amps for a while and check with Mr Foxwell?

__________________
2001 x5 3.0 (sold with broken motor), 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed,