I love my Lexus ls430 and I habe done the following so I convince myself the car is as good as new
Replaced front and rear bushings
air con pipes replaced as they were corroded
replaced air suspension pump mounts to stop small vibrating noise
replaced sub speaker surround
transmission and engine mounts replaced and this makes a huge difference
atf oil changes new filter and strainer
got new fitting kit to hold carpet mats in place
have replaced parking sensors when needed
installed vaistech music system
thanks to this forum all these niggles have been sorted and car drives beautifully
always buy genuine parts such as wiper rubber, brake pads, filter etc and they are not much more than blueprint in a lot of cases