I have a 2008 LS-460 with 72K miles and it starting making a popping noise in the front right when braking at slow speed.
Dealer said the control arms are bad and need to be replaced. Dealer estimate $over$ $9,200.00.
I searched around and found the parts on Rock Auto--$538 for all eight control arms.
I gave my son and his buddy-(who has access to a lift) $1,000.00 to replace all eight pieces---took them about 4 hours.
It is amazing how much smoother and better handling the car is now. And saved $7,700.00
Now all I need to do is get a 4 wheel alignment and I am good to go.