Jeep Liberty/Accessories/Control Arms
Front upper control arms (UCA) are available through the aftermarket. Once the Jeep Liberty is lifted, the UCA might rub on the coil. Replacement UCA for lifted KJs are available through Jeepin' Al, this will relieve the UBJC. Heavy duty UCA for non-lifted KJ are avaliable through Rusty's. Stock UBJ are not serviceable and not greaseable.
There is not aftermarket support for the front lower control arms (LCA). Lower Ball Joints (LBJ) are being recalled by Diamler Chrysler (Recall F23). Replacements BJs are avaliable by Moog (P/N: K3199), these BJ are greasable.
Replacement rear lower control arms (LCA) are for lifted KJs available through Rubicon Express (P/N: RE3715) and Rusty's. Rubicon Express rear control arms are actually made for the TJ, but can be made to fit the KJ.