Water leaking in front passenger foot well - 2003 Volkswagen Golf

May be air conditioner stopped up running in grooves on front passenger side to back floor board

Are you certain it is rain water? It could be condensation from the A/C coil that fails to drain out of the drain pan, or possibly coolant from a leaking heater core. If you are certain it is rain water, depending upon the age of the vehicle, and possibly some other things, here are the possible options:

1. Leaking door gasket.
2. Leaking windshield seal due to rust
3. Leaking windshield seal due to improper installation
4. Leaking windshield seal due to acoustic (sound) over pressure (if you have extreme sound system with heavy bass)
5. If you have a sunroof, if the drain hose comes down the passenger side door column, it could be leaking into the passenger compartment rather than drain through the floor pan.

the EVap chamber drain hose is broken and now leaks
condensate water (pure) to the foot wells, and not to garage floor as it should, easy fix.

yes it does have front drains look behind the side kick panel in the front seat foot wells

You can only have 2 issues dripping water onto the passenger floor board. First being a clogged drip line for the ac evaporator. The other is a leaking heater core. Figuring out which one is the issue is fairly easy.

If your vehicle has anti freeze in it when you turn the defrosters on it will smell sweet. If it does you have a leaking heater core. If it does not then the drip line is clogged.

To clear the drip line get under the vehicle and snake the drip line on the firewall. It usually is a 90 degree rubber or plastic piece on the passenger side about a third of the way up the firewall. A leaking heater core means it has to be replaced and not really a job for someone that is not exsperienced.

the leek, ac tray inside the passenger side has a tube that carrys the water out of the car and it might be clogged up
the lights , fuse maybe

there is either a torn vapor barrier on the passenger door or the sunroof drains are blocked

Water is conensation from the air conditioning system. redish oil is most probably a antifreeze leak, does it look like a redish water? If so then its antifreeze toyota uses a pink/red long life anifreeze. most likley from a water pump which is right in that area

well if you have water or coolant leaking on to the rug in your car, first you must remember that every car has 2 radiators. One for the Engine which is in the front of your car under the hood and one for your heater, which is usually hidden deep behind the dash inside of your car. So if you are leaking fluids on to the rug in the car; Im 90% sure its going to be something dealing with the heater radiator. What you have to do is find out where your heater radiator is on your car and check all the hoses.

The most common source of this kind of leak is the windshield, have a glass shop check the sealing around the glass