The Subaru Impreza was introduced in 1993; it is a compact car available in four-door sedan and five-door hatchback. Edmunds.com reports that the Impreza is an above-average compact car with four-wheel drive and an impressive powertrain.
Subaru Technical Service Bulletins indicate that the main clutch issue with the Subaru Impreza is clutch "sticking." A sticking clutch occurs when the clutch pedal does not release after you press it down. A sticking clutch TSB is reported for every model year from 1997 to 2003.
The primary cause of a sticking clutch is a clutch master cylinder that lacks brake fluid. A clutch master cylinder in need of fluid will not provide the pedal with enough hydraulic pressure to release itself once pressed. A less common cause is a leaking clutch master cylinder.
Your first repair option is adding break fluid to the clutch master cylinder reservoir. If problems persist, check to see if the clutch master cylinder is leaking. A leaking clutch master cylinder has to be completely drained and replaced.