Whenever a rubber snap-in valve based TPMS sensor is removed from a wheel, it should be replaced with new rubber snap-in valve. Attempting to reuse the original rubber snap-in valve and valve core may result in an air leak.

Jeep; Liberty; 2012-2010
Jeep; Liberty; 2009; Sport
Jeep; Liberty; 2008-2005
Jeep; Patriot; 2012-2007

http://www.tpms.com/product_p/sk0008.htm