Nissan Vapor Canister Purge Valve - 1AEMX00251

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Vehicle Fit

This Vapor Canister Purge Valve is a new part. It mounts on the engine and is used to control the flow of vapors from the EVAPORATIVE system to the intake manifold. It is controlled by the vehicles main computer or ECM. When the ECM sends the activation signal, a plunger in the valve will move to seal the vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative loss system components. This valve is used only for diagnosis, and usually remains opened. When the vent is closed, under normal purge conditions, the evaporative loss system is depressurized and allows "EVAP Control System (Small Leak)" diagnosis. If this valve is defective, the Check Engine Light will illuminate to Set with Small Leak Diagnosis. Some of the trouble codes associated with this part being defective are: P1456, P1448, P0449, and P0455.


  • Brand new component
  • Valve only, does NOT include canister
  • Replaces dealer part number: 149305M00A
  • Engine mounted
  • Direct replacement
  • Built to strict quality control standards

Over time and daily use the valve can wear out causing the check engine light to set. If the valve is the problem, replace it now with this part.

Item Condition: New

Attention California Customers:

WARNING:  This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Vapor Canister Purge Valve (0:37)
    • Disconnect the vapor canister purge valve wiring harness
    • Loosen the purge valve hose clamps with needle nose pliers
    • Pull the hoses off the purge valve
    • Remove the 12mm nut from the purge valve
    • Pull off the purge valve
  2. step : Installing the New Purge Valve (1:47)
    • Put the new purge valve into place
    • Fasten the washer and 12mm nut onto the purge valve
    • Connect the purge valve wiring harness
    • Connect the two hoses to the purge valve
    • Tighten the purge valve hose clamps with needle nose pliers

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Needle nose pliers

  • Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 12mm Socket

5.00/ 5.0
2 reviews
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1 Star
Purge Valve
The purge valve for the 2004 Nissan Altima was exactly what I needed to get my car back on the road. After installing, I no longer had issues when filling the the car with gasoline. It would start right up! I recommend this part to anyone, it came exactly as pictured and the price was the lowest I found.
January 30, 2017
Love it!!! This is the only website i use to purchase my vehicle parts!!!
July 27, 2017
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Year Make Model Description
2002-2003Nissan Altima Nissan Altima Vapor Canister Purge Valve L4 2.5L
2003-2004Nissan Altima Nissan Altima Vapor Canister Purge Valve V6 3.5L
2004-2006Nissan Altima Nissan Altima Vapor Canister Purge Valve L4 2.5L (excluding California Emissions)
2000-2004Nissan Frontier Nissan Frontier Vapor Canister Purge Valve
2004Nissan Maxima Nissan Maxima Vapor Canister Purge Valve
2004Nissan Quest Nissan Quest Vapor Canister Purge Valve
2002-2006Nissan Sentra Nissan Sentra Vapor Canister Purge Valve L4 2.5L
Only 2 left in stock
Part #: 1AEMX00251

Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

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How-to Video:

(02:40 min)