MoparPartsGiant.com offers the wholesale prices for genuine 2014 Jeep Grand Cherokee parts. Parts like Nitrogen Oxide Sensor are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.0L Diesel, 6 Cyl 3.6L, 8 Cyl 5.7L, 8 Cyl 6.4L. Transmission: 8-Speed Automatic Transmission.