X – auta MG
x – napęd BMW
X – X 1/9
X – X-Type
XAα – koncept Suzuki
x-AHC – Active Height Control
XAV – eXciting Autentic SUV
XC – Cross Country
XDS – Elektronische Differenzialsperre XDS
XIV – eXciting user Interface Vehicle
XL – Extra Large
XL – Extra Load
XLV – eXciting smart Lifestyle Vehicle
XR – auta Forda
XR – X(cross)over Runner
XT – Crossover Turing
XUV – Excellent User Interface Vehicle
XV – Cross Vehicle
XWD – Cross Wheel Drive
