Arnott's aftermarket rear air spring A-3233 fits the 2013-2019 Cadillac XTS (Epsilon II Platform) with Automatic Level Control rear suspension and with or without All Wheel Drive. The Arnott air spring is assembled in the USA with a cross-axis, multi-ply, Firestone air sleeve engineered for extended service life. Arnott assembles this air spring in the USA with Tier 1 components such as heavy-duty crimp rings, high impact resin top and piston, and a new 4MM airline fitting for a fast installation. This universal air spring fits the left or right side of the vehicle. Note: Arnott recommends replacing these springs in pairs.