for Jettas and Golfs particularly 1992 and older the water comes through the doors. The vapor barriers deteriorate and will need replaced with much care taken to ensure a perfect seal.
205.00 at the dealership
Be careful - some of these products can plug the heater core
It could be the crack (coolant) pipe, or thermostat housing leak. Have something that knows about the engine look for signs of coolant leak. Unless your oil is foaming, then it sounds like a head gasket leak.
P0442 (EVAP emission system leak detected small leak) It could be a pin hole leak in any part of the fuel system, from the gas cap all the way to the vacuum lines on the intake manifold. A service shop has a tool to pressurize the system with "smoke" to locate source of leak.
I it only happen when the ac is on, your ac water conduction hose is plugged. Go under the passanger side of the car and look for a rubber hose that is size of a dime and blow air in to it with a air compressor to un plug it.
depends on how much water, but in all probability, yes
If your car is leaking coolant get it fixed and put in the recomended coolant for your car. You should locate that info in the manual, also putting water in the winter is a bad idea since the water could freeze causing engine damage. I supposed you might be able to run it for a while in the summer with just water but get the leak fixed and put in the recomended antifreeze/coolant
Probably have a leak in the heater core>
There is obviously a leak in either the firewall/cowl area or the window seal.
Are you running the air conditioner? If the drain line is plugged, it will leak water (condensation) onto the passenger side floor.
A water leak on the passenger side floor of a 2004 Saab 93 can be caused by several issues. Common culprits include a clogged or damaged sunroof drain, which can allow water to overflow and seep into the cabin. Additionally, a faulty door seal or a leak in the windshield seal can also contribute to water entering the vehicle. Lastly, a problem with the heater core, such as a leak, could cause coolant to accumulate in that area, mimicking a water leak.
Dry up the water. Take the car to a car wash and spray it good around doors and windows. If a leak is not visible then check the floor during rain storms while driving to see if water is coming in through a leak in the floor.