I have a 2001 nissan quest.can you kindly tell me where the cabin filter is and how manny

Here's a link to where your fuel filter is... How do you change the Fuel Filter on 2000 Nissan Quest and

There is a cabin air filter used on some models.
It is under the trim panel between the windshield and the hood.
Check your owners manual for details.

Dust & pollen cabin air filter location:

Hello, I'm sending you exploded view of the glove box and the in cabin micro filter cover illustration. Remove the two upper screws on the glove box and carefully pry metal clips loose.
Disconnect glove box lamp electrical connector. Do not let glove box assembly hang from glove box lamp harness.
Remove three lower screws and remove damper clip from glove box door. Separate glove box housing and passenger instrument lower panel.
Remove three screws and remove in cabin micro filter cover.
Remove in cabin micro filters from front heater and cooling unit assembly.
Note When installing two new in cabin micro filters ensure that the filters are facing in the direction indicated by the direction arrow for the airflow. Direction arrow is printed on side of in cabin micro filters.
Install in cabin micro filter cover. Reinstall glove box.
Thanks

Well first if you smell gasoline don't start the vehicle, check the entire fuel system locate the filter and check for leaking, also this vehicle uses a cabin filter to filter incoming air to the passenger compartment, locate this filter and replace it. there located sometimes behind the glove box door, or under the front cowling under the hood, in that space just under the wipers, If you can't find the solution and the smell persists, you need professional help ( with the car)

This particular model does not come equipped with a Cabin Air Filter.

I'm going to send you exploded view of the glove box and the in cabin micro filter cover illustration. Remove the two upper screws on the glove box and carefully pry metal clips loose.
Disconnect glove box lamp electrical connector. Do not let glove box assembly hang from glove box lamp harness.
Remove three lower screws and remove damper clip from glove box door. Separate glove box housing and passenger instrument lower panel.
Remove three screws and remove in cabin micro filter cover.
Remove in cabin micro filters from front heater and cooling unit assembly.
Note When installing two new in cabin micro filters ensure that the filters are facing in the direction indicated by the direction arrow for the airflow. Direction arrow is printed on side of in cabin micro filters.
Install in cabin micro filter cover. Reinstall glove box.

lock cylinder bad.

go here for more help on villager/quest

http://autos.groups.yahoo.com/group/villagerquest/

there is a "cabin air" filter,probly under hood,close to firewall,remove this and see what happens.if it works replace filter,dont recomend trying to clean it,as a new one wont cost much at your local napa or other parts store.

Remove glove box and in cabin microfilter door will be right there. Note on some Xterras there is no filter installed and the box will need to be cut out in order to install kit. This is a fairly easy task that can be done in the vehicle. Just follow the directions and you should be ok.