HICAS
HICAS (/haɪkæs/; High Capacity Actively Controlled Steering) is Nissan's rear wheel steering system which was fitted to cars from approximately 1985 to 2010, including models ranging from the Skyline (R31, R32, R33, and R34) and Fairlady Z (Z32) to smaller vehicles like the Nissan Cefiro (A31), Silvia (S13 & S15)/240SX/180SX and Nissan Serena/Nissan Largo. It is also found on models from the Infiniti division, such as the Q45, J30, M45/M35 and G35/G37.
Unlike many other four wheel steering systems, HICAS and Super HICAS are fitted to improve handling rather than just as a parking aid. Disabling or removing HICAS has become a popular aftermarket modification, with proponents citing more predictable steering behavior as an advantage. However, after disabling HICAS, it has been noted that slow maneuvers including parking and quick response steering seemed more difficult.