This listing is for one NTK oxygen sensor for various Chevrolet, Cadillac and GMC models. Please see the compatibility list for fitment info to be sure this is the correct O2 sensor for your vehicle NTK Part number: 12657188 12643903 12655678 12661898 12683553 2344974 12655678 2348088 234-4974 234-8088 This is a new part, but since I received them in a master case it does not include individual retail packaging 12643708, 12645561, 12655677, 12655678, 12657188, 12659516, 1266.
