To find the correct CCA rating, you should:
* Check your owner's manual: This is the best source. It will specify the recommended battery group size and often a CCA range.
* Look at the old battery: The CCA rating is usually printed directly on the battery case.
* Check a parts store website: Enter your Jeep's year, make, and model (2002 Jeep Liberty) into a website like AutoZone, Advance Auto Parts, or NAPA Auto Parts. They will show you the appropriate batteries and their CCA ratings.
Without more specific information, I cannot give you a definitive CCA rating.