1K0721261L, 1K0721261, 1K0721261A, 1K0721261AA, 1K0721261F, 1K0721261G, 1K0721261H, 1K0721261J, 1K0721261K, 1K0721261N, 1K0721261Q, 1K0721261T, 5Q0721261C. Hydraulic clutches are similar to brakes. When your foot pushes on the clutch pedal, it transfers hydraulic fluid from the master cylinder, through the lines to the clutch slave cylinder to engage the clutch.
