As you would expect the latest part number replaces many more numbers used in the past. I hope this answers your request and is helpful. Good Luck!
055111506ac, COMPRES0R-Air Conditioning
Replaces: RL111506AB, R5111506AB, R5111506AC, R5111506AD, 55111506AA, 55111506AB
Description: Liberty. Nitro. 3.7L.
Nitro Year: 2007 (1 of 91,815 sold in 07)
Nitro Model: R/T 4X4 Stone White
CAT-BACK Exhaust, CAI, Projector Head Lamps
Fully-Equipped w/all factory options