Mazda 3 Service Manual: Clutch Fluid Leakage Inspection [C66 M R]
Do not allow clutch fluid get on a painted surface. Clutch fluid contains properties which can dissolve the paint. If clutch fluid gets on a painted surface, wash it off with water immediately and wipe the area off completely.
1. Pump the clutch pedal a few times.
2. Inspect for the clutch fluid leakage at the points indicated in the figure.
If there is clutch fluid leakage from the piston in the clutch release cylinder, there is clutch fluid in the boot of clutch release cylinder.
If there is clutch fluid leakage, repair or replace the malfunctioning location.