I use the 04781452BB filter on my 3.7L Dakota, I buy them from the Dodge dealer for $5.00 each, The code number is also referred to as MO-452, I cut one open and it is a very good filter it has a generous amont of filter paper, as far as I can tell it is the same as the Wix Filter 51516 with the difference that the Mopar Filter has a nitrle anti-drain back valve, I only buy enough for one year and they are always fresh out of the box, the dealer goes through so many filters they are never old, I do not like to buy filters from the store because people open the boxes to look at them and I have seen them dropped on the floor.