You would need to be more specific with your question. You are not providing enough information to supply a meaningful answer.
There are two.
1999-2002 Villager or Nissan Quest.
Plug in a scan tool.
1999 - 2002.
After looking at the ( 1996 , 1999 , and 2002 ) Mercury Villager Owner Guides : The fuel tank capacity is ( 20.0 U.S. gallons / 75.7 liters )
Sitting right on top of the engine.
If it is defective it will need to be replaced.
By the fusebox under the dash.
No, the speedometer is driven electrically from the PCM.
16 inch on my 2002 sport (aluminum alloy wheels)
To change the thermostat on a 2002 Mercury villager, pull the hose away. If the bolts do not come off, wiggle the fitting to expose the thermostat to be able to change it.
1999 - 2002.