A 2002 Ford Taurus and a 2002 Mercury Sable share many components, and
it's highly likely that the fuel injectors would be interchangeable. However, you should
always double-check the specific engine codes for both vehicles. The engine code (usually found on a sticker on the engine block or in your owner's manual) will determine the precise fuel injector specifications. Even if they're the same year and model, slight variations between engines can exist.
Before you install them, verify compatibility through a parts store's online database (like AutoZone, Advance Auto Parts, etc.) using the VIN numbers of both cars. This will ensure a perfect fit and prevent any potential damage.