When the clutch master cylinder has problems, it can lead to issues with the clutch pedal and gear changes. Usually a bad or failing clutch master cylinder will produce a few symptoms that can notify the driver that a potential problem has occurred and should be serviced; low or dirty clutch fluid, difficulty shifting gears, abnormal clutch pedal behaviour, noisy engagement and presence of oil on the cylinder. The clutch master cylinder is an important component and if it develops any problems, they can quickly lead to issues that affect the overall drivability of the vehicle. If your vehicle is displaying any of the symptoms above or you suspect that your master cylinder may be defective, have the vehicle inspected by a professional technician to determine if the car will need a replacement clutch master cylinder.