Replacement Emission Control Parts

In the 1950s and 60s, emissions from automobiles were identified as a major cause of air pollution, and the first emission controls like Positive Crankcase Ventilation (PCV) and secondary air injection began to appear. In the decades since, clean air regulations have become tougher, and the emission control system more complicated. But thanks to our great selection of emission control parts, you can keep your vehicle’s emission control system in top shape.

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Combustion gases that leak past the piston rings, called “blow-by”, can pressurize the crankcase and cause oil leaks if not allowed to escape. Since these gases contain harmful Hydrocarbons (HC) emissions they can’t be released to the atmosphere, so the PCV system routes them to the air intake, where they combine with the air/fuel mixture and are burned. If your PCV valve is clogged, we have the replacement that’s right for your engine.

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    • (0 reviews)
      # mpn358726706
      PCV Breather Cap by Trans-Dapt®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.58
    • (5 reviews)
      # sp27192
      GM Original Equipment™ 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 GM OE Oxygen Sensor help.
      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
      $13.53 - $208.06
    • (0 reviews)
      # sp112242
      BladeRunner EGR Cooler by aFe®. Replace your failing or about-to-fail EGR cooler and save your engine. A plugged or leaking EGR cooler can literally destroy an engine in seconds. This 100% welded, stainless steel cooler is far stronger...
      Stainless steel construction100% TIG welded, not brazed
      $270.75 - $807.50
    • (1 review)
      # sp99083
      Oxygen Sensor by Bosch®. The Bosch oxygen sensor utilizes a mix of zirconium and yttrium oxides and other elements to form a tough base that withstands the intense stress to which oxygen sensors are subjected. Each element is incredibly...
      OE-EquivalentOE Style connectors and wire lengths
      $28.69 - $118.74
    • (2 reviews)
      # sp5758
      EGR Valve by Delphi®. Delphi exhaust gas recirculation (EGR) valves are a 100 percent OE line, providing an exact fit without the need for orifice washers or clocking for fast, easy installation. Precision manufacturing provides...
      Increases fuel efficiency while eliminating the potential for malfunctionsGaskets included
      $40.90 - $206.71
    • (0 reviews)
      # sp13453
      Diesel Emissions Fluid Pump by Dorman®. Manufactured specifically for diesel vehicle's, Dorman's Diesel Emission Fluid (DEF) Pump is quality tested to calculate and supply fluid to the diesel exhaust pipe. As an added benefit,...
      Replace the piece, not the assemblyPlug and play design for easy installation
      $218.95 - $222.95
    • (1 review)
      # sp13479
      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 for integrity to all channels of...
      Featuring industrial grade materials for robust performanceEnd of the line testing ensures quality in every box
      $35.60 - $390.72
    • (0 reviews)
      # sp106509
      EGR Cooler 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 to all channels of...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $275.80 - $928.82
    • (0 reviews)
      # sp12669
      Secondary Air Injection Pump by URO Parts®. Make your vehicle operating quiet again by replacing your malfunctioning component with this top-notch emission control part. The dependable URO part will make your exhaust system work as it...
      Designed to replace your worn out exhaust partHelps to restore quiet vehicle operation
      $129.82
    • (0 reviews)
      # sp27185
      GM Original Equipment™ EGR Valve Kit by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $40.92 - $173.22
    • (0 reviews)
      # sp94950
      EGR Cooler by Dorman®. Manufactured specifically for diesel vehicles, Dorman’s EGR Cooler is quality-engineered to cool exhaust gas and recirculate it back to the engine. Replacement prevents coolant from leaking into the exhaust...
      Manufactured from premium grade materialsBuilt to provide exceptional OE quality and function
      $177.95 - $702.68
    • (0 reviews)
      # sp107199
      Secondary Air Injection Pump by CVJ®. Is your CHECK ENGINE light on? Has your vehicle failed a state emissions test? Your vehicle's emissions control system is in need of repair, but before you waste your time and gas running out to the...
      High quality at an affordable priceExpertly made from premium materials
      $476.13 - $582.11
    • (17 reviews)
      # sp99082
      OE Connector 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, moderate...
      Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies
      $10.67 - $356.64
    • (2 reviews)
      # sp27211
      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 help. You can find...
      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
      $16.98 - $221.70
    • (0 reviews)
      # sp107242
      Vapor Canister by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM quality without the...
      Direct OEM replacement for proper fitRecommended by Ford Motor Company
      $47.81 - $453.69
    • (2 reviews)
      # sp94969
      EGR Valve by Dorman®. Keep your vehicle’s emission control system in top-notch condition with superior Dorman replacement emission control parts. Manufactured from top-grade materials using advanced technologies, these parts are...
      Manufactured from premium grade materialsBuilt to provide exceptional OE quality and function
      $31.95 - $264.95
    • (3 reviews)
      # sp94914
      Air Fuel Ratio Sensor by Denso®. Make sure your engine runs efficiently and produces fewer emissions by replacing your malfunctioning fuel-ratio sensors with these top-notch products designed by Denso. Engineered with the use of the...
      Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies
      $35.57 - $363.08
    • (0 reviews)
      # sp107264
      Secondary Air Injection Pump by Genuine®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $291.23 - $857.69
    • (0 reviews)
      # sp13380
      Baffled Oil Catch Can by Mishimoto®. The Mishimoto Baffled Oil Catch Can is the most advanced oil catch can on the market. Every turbo system deserves to be complemented by a proper oil catch can setup, also known as an air oil...
      Allows baffled catch can to be drained without removing it from vehicleNylon barbed mini ball valve can be spliced into rubber hose for ease of draining
      +5
      $157.50 - $423.75
    • (1 review)
      # sp27974
      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 to all channels of...
      One-piece laser welded body for maximum protection and precise operation maintaining sensor integrityDual internal talc seal makes your oxygen sensors last longer
      $14.65 - $186.90
    • (2 reviews)
      # sp13474
      PCV Valve by Motorcraft®. Choose premium replacement brake pads, A/C compressors, oil filters, ignition coils, and more by Motorcraft to restore the performance of your vehicle. Is your CHECK ENGINE light on? Has your vehicle failed a...
      Direct OEM replacementMeets strict Ford Motor Company standards
      $3.57 - $91.30
    • (0 reviews)
      # sp109222
      GM Original Equipment™ PCV Valve by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $3.62 - $54.12
    • (1 review)
      # sp107229
      Vapor Canister by Dorman®. Dorman’s Vapor Canister is engineered from robust materials. As part of the Evap system, it effectively stores fuel vapors from the gas tank and sends them to the engine for combustion. Replacement helps...
      Direct replacement for a proper fitA necessary replacement item for passing inspection in certain states
      $37.95 - $561.95
    • (1 review)
      # sp27949
      EGR 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 reputation for integrity to all channels of...
      Polyester-reinforced silicone diaphragm resists thermal aging in temperatures up to 200°CInjection-molded high-temperature polymer prevents temperature-releated failures
      $22.61 - $696.48
    • (13 reviews)
      # sp5156
      Oxygen Sensor by NTK®. This product is designed to improve engine efficiency and fuel mileage, while reducing emissions and extending catalyst life. The oxygen sensor is made of premium quality material and extensively tested during...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $11.68 - $173.44
    • (1 review)
      # sp22818
      Aluminum Coolant Overflow Tank by Weapon-R®. Whether you’re going racing or just want to look like you are, this aluminum tank will dress up your engine compartment.
      Manufactured from Billet 6061 AluminumInstalls in OEM location
      $127.50 - $136.00
    • (0 reviews)
      # sp107240
      Secondary Air Injection Pump by Motorcraft®. Keep your vehicle's emission control system functioning properly with this quality product. Manufactured for your specific vehicle, the part meets strict Ford Motor Company standards and...
      Built to strict Ford Motor Company specificationsRecommended by Ford Motor Company
      $116.91 - $182.50
    • (2 reviews)
      # sp107310
      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 for integrity to...
      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
      $25.30 - $677.24
    • (0 reviews)
      # sp107311
      Intermotor™ Vapor Canister Vent 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 highest reputation for...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $15.22 - $307.04
    • (0 reviews)
      # sp107321
      Professional™ Vapor Canister by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $23.25 - $262.80




    High combustion chamber temperatures can cause oxides of nitrogen (NOx) to form, which cause smog. The Exhaust Gas Recirculation (EGR) system sends a metered amount of engine exhaust into the intake air stream to cool combustion and reduce NOx. It may sound odd to cool with hot exhaust, but since it is an inert gas (contains no oxygen) and will not burn, combustion temperature is reduced. The EGR valve is the major component in the system, but there are also sensors, switches, solenoids and relays that can fail. No matter which part of the system breaks down, we have the parts for a successful repair.

    Up until the early 1970s, fuel vapors were allowed to escape from the fuel tank and carburetor. This was recognized as a major contributor to HC emissions, and the evaporative emission control system (EVAP) was developed in response. With EVAP, the fuel system is sealed, and a carbon canister is used to collect and store the fuel vapors, which are ultimately routed to the engine when it’s running and burned in the combustion chambers. We have all common EVAP system parts like filters, vapor canisters, and purge valves and solenoids, for a successful repair.

    The secondary air injection system, pumps air into the exhaust system to cause further oxidation of unburned fuel in the exhaust, reducing Hydrocarbons (HC) and Carbon Monoxide (CO) emissions. The catalytic converter contains precious metals that act as catalysts to convert HC and CO to CO2 (Carbon Dioxide) and water, and reduce NOx emissions. The catalytic converter works in concert with the oxygen sensor, which signals the exhaust oxygen content to the ECM to control the air/fuel mixture. An overly rich mixture can overheat and damage the converter.

    Guides & Articles

    Useful articles fast to read and guides easy to understand written by mechanics and car enthusiasts to turn your shopping experience with CARiD into a pleasure

    • Replacement Emission Control Parts
      August 18, 2014
      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
    • Ignition Parts
      August 10, 2014
      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...
      by Timothy Zahl

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    Emission Control Reviews

    Average rating:  5  5 - 180 reviews  /  Read All Replacement Emission Control Parts Reviews
    4.8 of 5
    Great Parts at Better Prices
    I saved 50% buying Bosh from CARiD instead of NAPA or Advance Auto. Fast shipping and hassel free service.
    Posted by Lloyd Sawyer (Ticonderoga, NY) / July 11, 20182004 BMW X3
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