2003 Infiniti Q45 Emission Control

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  • Oxygen Sensors
  • PCV & Breathers
  • Vapor Canisters
  • Catalytic Converters
    • (0 reviews)
      # 21091905
      Infiniti Q45 2003, Oxygen Sensor by Denso®. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air fuel mixture under idle,...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $40.47 - $71.28
    • (0 reviews)
      # 710321092
      Infiniti Q45 2003, Professional™ Oxygen Sensor by ACDelco®. If your O2 Sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s Professional Oxygen Sensors...
      ACDelco Professional Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditionsCustomers can receive better gas mileage with a properly working oxygen sensor
      $81.87 - $95.32
    • (1 review)
      # 44944476
      Infiniti Q45 2003, Oxygen Sensor by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity...
      One-piece laser welded body for maximum protection and precise operation maintaining sensor integrityDual internal talc seal makes your oxygen sensors last longer
      $44.92 - $83.02
    • (0 reviews)
      # 22140054
      Infiniti Q45 2003, Oxygen Sensor by NTK®. Thimble type sensors feature a ceramic element that projects into the exhaust system and becomes electrically conductive at high temperature. The sensor element then sends voltage signals back...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $40.20 - $65.81
    • (0 reviews)
      # mpn53650515
      Infiniti Q45 2003, Intermotor™ Vapor Canister by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation...
      OE quality parts from top original equipment and aftermarket manufacturersEach fuel vapor canister is designed and tested to OE specifications for a direct-fit replacement controlling the loss of evaporative emissions from fuel systems to the environment
      $115.76
    • (0 reviews)
      # 22843185
      Infiniti Q45 2003, Oxygen Sensor by Spectra Premium®. To ensure your vehicle has optimal performance and fuel economy while producing minimal emissions replace a defective O2 sensor with one backed by the aftermarket’s most rigorous...
      Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements
      $35.33 - $51.89
    • (0 reviews)
      # 710353083
      Infiniti Q45 2003, Universal Fit Oxygen Sensor by Denso®. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air fuel mixture...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $35.16
    • (0 reviews)
      # 24162776
      Infiniti Q45 Base 2003, Premium Oxygen Sensor by Bosch®. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen Sensor from Bosch that is...
      OE Identical ConnectorCompact Design
      $40.53 - $83.24
    • (0 reviews)
      # 24162781
      Infiniti Q45 Base 2003, Universal Fit Oxygen Sensor by Bosch®. Universal Oxygen Sensors with OE SmartLink™ are quick and easy to install. Each sensor has enough length of sensor wire to allow maximum replacement of worn harnesses....
      Patented SmartLink™ connector systemNo special tools required for installation
      $34.02 - $34.78
    • (0 reviews)
      # 81769986
      Infiniti Q45 2003, Oxygen Sensor by Delphi®. As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar technology is the result of their OE and aftermarket engineers partnering together to develop the most...
      OE connectors and wire lengths within 3" of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life
      $58.46 - $78.69
    • (0 reviews)
      # 138911724
      Infiniti Q45 2003, Oxygen Sensor by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker...
      Makes installation quick and easyOptimal OE-style fit and quality
      $73.15 - $90.37
    • (0 reviews)
      # 1060528379
      Infiniti Q45 2003, Oxygen Sensor by Aceon®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
      Designed to provide long-lasting service lifeMade utilizing state-of-the-art equipment
      $20.85 - $22.08
    • (0 reviews)
      # mpn4545775929
      Infiniti Q45 2003, Oxygen Sensor by Maneki®. Upstream Driver Side. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship....
      Made to deliver second to none quality and absolute reliabilityBuilt to provide the ultimate in reliability and strength
      $13.31
    • (0 reviews)
      # mpn53649803
      Infiniti Q45 2003, Intermotor™ PCV Valve by Standard®. No Connector. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $20.94
    • (0 reviews)
      # 81398135
      Infiniti Q45 2003, 608 Series Catalytic Converter by AP Exhaust®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. With 1 Center O2 Sensor Port. Catalytic Inlet...
      A multitude of Universal converter bodies provided for maximum coverageProvides professional installer with immediate installation options
      $103.57
    • (0 reviews)
      # mpn474118262
      Infiniti Q45 2003, Catalytic Converter and Pipe Assembly by AP Exhaust®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Rear. Without Air Tube. Catalytic Converter Overall Length: 46". The growing concern for...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $566.00
    • (0 reviews)
      # 252968778
      Infiniti Q45 2003, Catalytic Converter and Pipe Assembly by DEC®. Converter Configuration: Direct Fit. With Y-Pipe. Y-Pipe with 2 Converters. Pick out a catalytic converter by DEC and get your emissions back into check without worrying...
      Direct fitMade from a heavy duty stainless steel outer shell
      $492.66 - $512.65
    • (0 reviews)
      # 898776501
      Infiniti Q45 with California Emission with LEV1 Standard with PC Weight Class Engine Family # 3NSXV04.5C8A 2003, Catalytic Converter by Davico®. Emissions: CARB compliant. Converter Configuration: Universal Fit. This Universal fit...
      $263.63
    • (0 reviews)
      # 868948297
      Infiniti Q45 2003, Stainless Steel Exhaust Manifold with Integrated Catalytic Converter by Dorman®. Emissions: EPA compliant. Color: Natural. Header Coating: Uncoated. More like a complete kit than a single part, many of the Exhaust...
      Includes heat-shield for protection of hoses, wiring, and other engine componentsConstruction protects against warping and/or cracking
      $523.95
    • (0 reviews)
      # 346412096
      Infiniti Q45 2003, Stainless Steel Exhaust Manifold with Integrated Catalytic Converter by Eastern®. Emissions: EPA compliant. If you need to replace your failed or damaged manifold, this product is the right choice. Designed...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $292.13 - $357.85
    • (0 reviews)
      # 391755612
      Infiniti Q45 2003, Direct Fit Exhaust Manifold with Integrated Catalytic Converter by AP Exhaust®. Emissions: EPA compliant. The growing concern for the environment means there is a growing need for quality emission control products. AP...
      5-year / 50,000-mile warranty on converterSpecifically engineered for Manifold Converter equipped vehicles.
      $336.50 - $412.20
    • (0 reviews)
      # mpn4144521444
      Infiniti Q45 2003, Exhaust Manifold with Integrated Catalytic Converter by DEC®. Position: Driver Side. Emissions: EPA compliant. Pick out a catalytic converter by DEC and get your emissions back into check without worrying to fail...
      Direct fitMade from a heavy duty stainless steel outer shell
      $478.38
    • (0 reviews)
      # 271000170
      Infiniti Q45 2003, OEM Grade Stainless Steel Exhaust Manifold with Integrated Catalytic Converter by MagnaFlow®. Primary Tubing Diameter: 1.75". Collector Outlet Diameter: 2.25". Emissions: EPA compliant. Color: Silver. Header Coating:...
      $443.66
    • (0 reviews)
      # mpn53649764
      Infiniti Q45 2003, Intermotor™ Vapor Canister Purge Solenoid by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $92.70
    • (0 reviews)
      # mpn53649917
      Infiniti Q45 2003, Intermotor™ Vapor Canister Purge Valve by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $111.88
    • (0 reviews)
      # mpn53650366
      Infiniti Q45 2003, Intermotor™ Vapor Canister Vent Solenoid by Standard®. Location: Bypass Valve. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products,...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $42.93
    • (0 reviews)
      # 133807225
      Infiniti Q45 2003, Vapor Canister Purge Valve by Dorman®. Dorman's Vapor Canister Purge Valve restores on-board diagnosis of the EVAP system. Plus, its high quality metal and plastic construction keeps the system working properly, year...
      Designed for enduring resistance to harsh road and weather conditionsDirect replacement for a proper fit every time
      $77.95 - $91.95
    • (0 reviews)
      # 83148521
      Infiniti Q45 2003, Vapor Canister Vent Solenoid by Dorman®. Dorman's Vapor Canister Vent Solenoid is engineered from robust materials to effectively direct the flow of fuel vapor through the EVAP system. Replacement restores on-board...
      Replacement helps to reduce atmospheric pollution due to hydrocarbon emissionsHigh-quality design for prolonged durability against harsh road and weather conditions
      $58.59 - $65.95
    • (0 reviews)
      # mpn4498312959
      Infiniti Q45 2003, Vapor Canister Purge Valve by Original Equipment®.
      High quality at an affordable priceExpertly made from premium materials
      $76.79
    • (0 reviews)
      # mpn4524529073
      Infiniti Q45 2003, Catalytic Converter and Pipe Assembly by PaceSetter®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Rear. If you want to get the most out of your vehicle, this PaceSetter product is second...
      Direct-Fit Catalytic Converters are a direct replacement for original equipmentManufactured using mandrel-bent 16-gauge and stainless steel tubing
      $403.26
    • (0 reviews)
      # mpn4525158285
      Infiniti Q45 2003, Exhaust Manifold with Integrated Catalytic Converter by PaceSetter®. Position: Driver Side. Emissions: EPA compliant. PaceSetter Manifold Catalytic Converters are custom-engineered to deliver maximum performance and...
      Manifold Catalytic Converters are a direct replacement for original equipmentManufactured using mandrel-bent stainless steel tubing for a low restriction tubular manifold design
      $350.31
    • (0 reviews)
      # mpn471145
      Infiniti Q45 2003, PCV Valve by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s,...
      OE quality products from top original equipmentTop quality materials
      $23.75
    • (0 reviews)
      # mpn1909788955
      Infiniti Q45 2003, Catalytic Converter and Pipe Assembly by Eastern®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Rear Undercar. Catalytic Converter Overall Length: 46". If you need to replace your failed or...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $441.51


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      Oxygen Sensors - Why Does My Car Have Four, And...
      An oxygen sensor (also known as an O2 sensor or Lambda sensor) is a sensor designed to generate a reading based on the content of oxygen in an automotive exhaust...
      by Michael Grayen
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      Auto Parts: Dealer vs. Aftermarket
      The question of whether to buy parts from an automotive dealer vs. ones from aftermarket manufacturers is as age-old as the automobile itself. Below, we'll take a look...
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