You replaced a slave cylinder on 97 Saturn sl1 with one from 94 will it work?

It's unlikely a slave cylinder from a 1994 Saturn SL1 will work perfectly in a 1997 Saturn SL1, even though they're similar models. While the basic function is the same, there might be subtle differences in dimensions, mounting points, or even the hydraulic fitting sizes over those three years. This could lead to leaks, improper engagement of the clutch, or even damage to the transmission.

It's best not to risk it. The relatively low cost of a new or properly used slave cylinder specifically for a 1997 Saturn SL1 far outweighs the potential costs of repairs from an incompatible part. Using the wrong part could lead to additional labor costs to remove and replace it again, along with the possibility of damaging other components. Always use the correct part specified for your vehicle's year and model.