My 1998 LS has devloped a wander at motorway speeds, any uneven surface tends to rock the car left and right and cause the car to wander neading constant steering adustments.
My local Lexus garage checked the suspension and advised the replacement of the N/S upper wishbone (the balljoint was worn) and both N/S and O/S reaction struts which has been done, everything else was OK.
The car has done 60,000 miles, has four brand new D8z tyres and a full alignment check and adustment was done when the balljoint was fitted.
Only thing I can think of next is springs and shocks.
Any help or advice please.