Where is the thermostat in 1991 passat?

In a 1991 Volkswagen Passat, the thermostat is typically located in the engine compartment, housed within the engine's coolant outlet. It is usually situated near the top of the engine, where the upper radiator hose connects to the engine block. To access it, you may need to remove the hose and possibly other components for easier reach. Always refer to a repair manual for specific details and guidance on your model.