Unlock I locked my keys in my Nissan 2095 quest van

That is no how the system works.

you need too get some sort of hook on the end of a handle, something smaller but still strong enough to pull against with out bending or breaking. then standing at the front of the van using a flashlight look through the grill until you find the hood latch, then locate the black cable running into the side of the latch hook on to it and pull as hard as you can while simultaneously bouncing pressure on the font center area of the hood with your other hand until you hear/feel the hood latch release or "pop"!

stick the key into the drivers door lock and lock the van- then unlock it with the key- this should shut it off-if you have a key fob try locking and unlocking with it this should also shut it off-cheers Denny

check if there is spark in your plugs, if none, just replace ignition coil.

It may be that water/moisture has gotten in behind the door panels...do you notice that it worsens in damp(er) weather? The car unlocks by itself if you leave the key in the ignition and you try and lock the doors.

Or somebody has the same coded fob (unlikely).

You might want to reprogram the remotes if you determine that the area behind the door panels is dry and there are no corroded wires, etc.

https://youtu.be/30TBRP1Mn5w

Good Luck.

2004 Nissan Quest Remote Programming Note: You must have all remotes on hand when performing this procedure. Any remotes not used during this procedure will become inactive.
1. Close and lock all doors with the driver's side power lock switch located on drivers door panel.
2. Insert key into ignition (DON'T TURN) and remove it from the ignition key cylinder at least 6 times within 10 seconds (this will need to be done at approximately one second intervals). You may need to insert and remove the key up to 10 or 12 times until your hazard lamps flash. PLEASE NOTE: Withdraw key completely from ignition cylinder each time. If this procedure is performed too fast or too slow the system will not enter programming mode.
3. Insert key into ignition and turn to the ACC position.
4. Within 5 seconds, push the LOCK button on the keyless remote. Your hazard lamps will flash. PLEASE NOTE: Do not press the button on the remote more than one time or the programming will not be successful.
5. If there are any remaining remotes (including working ones), Unlock then Lock all doors using the switch on drivers door panel. Within 5 seconds of locking and unlocking doors press LOCK button on the next remote. Your hazard lamps will flash. Repeat this step for each remote (including any working remotes).
6. When all remotes have been programmed turn the key to the OFF position, remove keys from the ignition, unlock doors using the driver's side power lock/unlock switch and open the driver side door. Test all remotes.

use ur key to open the driver side of the door while door is open,,,it should shut off

tap the starter at the same time turning the key. if it starts ,replace starter.

two places that have info on nissan quest rear brakes

http://www.ehow.com/how_5896243_replace-rear-brakes-nissan-quest.html

http://questdriver.com/node/1131

try turning the wheel back and forth while wiggling the key if that doesn't work i need more info.

first make sure,that the batter is ok. You will need to have both remotes while doing this.
1: get in and lock the doors with the power door lock
2: insert the key into the ignitoin repeatedly IN and OUT 6 times in a row or just keep doing so, until the hazard flashers flash on the dash board (observe the dash board while inserting key)
3: after the hazadrs flash TURN key into the ACC position/not start.(dash will light up) DO NOT START
4: with the key in ACC position, hit lock button on the remote. That will program that remote.
5: to program the other remote simply unlock the door with the door lock switch and relock it with the swithc and hit the other remote button.
6: done