id like to no if a remote starter would work on a 04 nissan sentra the reason i ask they have a chip in the ignition key

well......if that "chip" thing is for real,
then the engine wouldn't start without the key,
so no, remote starter wouldn't work.

btw, take care of your keys, it costs about
$180~$250 for a new key

I believe some remote starters are programmable to send the same signals as the keys would. Obviously, only the more expensive ones can do that though.

Anything is doable these days, I charge around $ 200.00 to get one done, there are bypasses that you can use with out doing anything to you Key/Alarm system, keep everything original,

Your Wirings

MODEL YEAR(S)
SENTRA 2000 -2005
KEY T-HARNESS IMMOBILIZER
N/A N/A NISSAN'S TRANSPONDER ANTI-THEFT SYSTEM, Requires 791 Bypass Module and extra Ignition Key
PART COLOR LOCATION
12 VOLT CONSTANT WHITE/RED (+) IGNITION SWITCH HARNESS
STARTER BLACK/WHITE (+) See NOTE *1 IGNITION SWITCH HARNESS
STARTER 2 BLACK/YELLOW (+) See NOTE *1 IGNITION SWITCH HARNESS
IGNITION 1 BLACK/RED (+) IGNITION SWITCH HARNESS
IGNITION 2 N/A
IGNITION 3 N/A
ACCESSORY/HEATER BLOWER 1 WHITE (+) IGNITION SWITCH HARNESS
ACCESSORY/HEATER BLOWER 2 WHITE/BLUE (+) IGNITION SWITCH HARNESS
KEYSENSE N/A
PARKING LIGHTS ( - ) N/A
PARKING LIGHTS ( + ) WHITE/RED (+) or RED/BLUE (+) IN DRIVERS KICK PANEL or HEADLIGHT SWITCH
POWER LOCK GRAY (TYPE B) @ SECU, See NOTE *2
POWER UNLOCK PURPLE/RED (TYPE B) @ SECU, See NOTE *2
DOOR TRIGGER See NOTE *3 @ SECU, See NOTE *2
DOMELIGHT SUPERVISION RED/YELLOW (-) @ SECU, PIN 8, See NOTE *2
TRUNK RELEASE RED (-) @ HATCH RELEASE SWITCH
SLIDING POWER DOOR N/A
HORN WHITE/GREEN (-) @ STEERING COLUMN HARNESS
TACH ANY WIRE BLACK/RED, PURPLE, BLUE/RED or GRAY/RED @ ANY IGNITION COIL
WAIT TO START LIGHT N/A
BRAKE RED/GREEN (+) @ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM WHITE/BLUE(-) @ SECU, PIN 30, See NOTE *2
ANTI-THEFT TRANSPONDER ANTI-THEFT SYSTEM, REQUIRES 791 BYPASS MODULE AND EXTRA IGNITION KEY TRANSPONDER @ IGNITION SWITCH TUMBLER
EXTRA INFORMATION
NOTE *1 When Installing a REMOTE STARTER, you MUST use BOTH Starter #1 and Starter #2 wires. Both wires must be connected to the STARTER/CRANKING Output wire from the Remote Starter or the vehcile will NOT Remote Start when the Engine is cold. NOTE *2 THE SECU (Security Electronic Control Unit) IS LOCATED TO THE RIGHT OF STEERING COLUMN. NOTE *3 ON VEHICLES WITHOUT POWER DOORLOCKS USE RED/WHITE (-) IN DRIVERS KICK PANEL. ON VEHICLES WITH POWER DOORLOCKS, USE RED (-) FOR DRIVERS DOOR AND RED/WHITE (-) FOR PASSENGER DOOR, WHEN CONNECTING TO AN ALARM SYSTEM USE BOTH DOOR TRIGGER WIRES AND DIODE ISOLATE, TO CONNECT, See DIAGRAM