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Meet the indisputable leader of the subcompact segment: Smart. Since the introduction of the first Smart in 1998, the definition of what car is has drastically changed. Unlike other cars of the era, Smart represented the new way of thinking: not the never-ending highways and mighty gas-guzzling engines, but rather rational fuel consumption, maneuverability, and the ability to park where others give up. That might sound contradictory but Smart is designed for people who thrive for freedom, unrestrained by overcrowded city streets or outdated ‘the bigger the better’ approach.

Emission control parts are designed to reduce air pollution. First systems appeared in the 1950, when vehicle emissions were considered to be a major cause of air pollution. Have that frustrating “Check Engine” light popped up? Don’t panic and just have your emission control system checked. We have everything to keep your Smart Car's engine running efficiently and your fuel bills lower than ever. Our shop offers a great variety of Smart Car emission control parts. Choose among time-tested brand names like Bosch, Accel, Genuine, NTK, or Denso and check which of the replacement parts are available for your Smart model.

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    • (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...
      Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies
      $35.42 - $393.18
    • (11 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,...
      Designed to help reduce fuel consumption and harmful emissionsMade with the use of state-of-the-art sensor technologies
      $10.87 - $512.39
    • (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...
      OE-EquivalentOE Style connectors and wire lengths
      $8.57 - $123.65
    • (1 review)
      # sp92988
      Wideband Oxygen Sensor by Bosch®. This sensor utilizes a sophisticated sensing element enabling it to produce a precise output in proportion to the air/fuel ratio. The A/F sensor measures exhaust gas oxygen accurately from as rich...
      Detects the exact amount of unburned fuel in the exhaust streamOE connectors and OE-style harness for continuous wire from connector to sensor
      $42.30 - $304.36
    • (12 reviews)
      # sp5156
      Replacement 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...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $12.00 - $238.26
    • (0 reviews)
      # sp5756
      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 innovative...
      OE connectors and wire lengths within three inches of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life
      $12.24 - $201.38
    • (3 reviews)
      # sp99297
      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 testing...
      Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements
      $7.93 - $272.39
    • (0 reviews)
      # sp26976
      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 accessories, you get...
      Makes installation quick and easyOptimal OE-style fit and quality
      $25.45 - $202.29
    • (1 review)
      # sp94077
      Universal Fit Catalytic Converter by AP Exhaust®. Three-Way No / Air OBDII By Design US-EPA Compliant catalytic converters are efficient at the oxidation of HC’s and CO, and very efficient at the reduction of NOx, storing O2, and...
      Manufactured from high quality materialsDesign meet needs of OBDII equipped vehicles
      $43.26 - $348.41
    • (0 reviews)
      # 458979679
      Universal Compact 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...
      40-micron bronze filter blocks oil from depositing in ventilation systemSpecial engineered inlet pattern "turbulates" air longer, allowing oil to condense
      $116.25 - $127.50
    • (0 reviews)
      # 458896295
      Universal Oil Catch Can by Mishimoto®. Includes: Aluminum Tank, 2 Black Fittings 10mm I.D., Black Bracket, 2 Allen Bolts, 2 Allen Bolt Washers, Black Magnetic Drain Plug, Dowty Seal, 2 Small Clamps, 2 Bolts, 2 Nuts, 80 cm...
      Separates oil particles from PCV/CCV airDefends intercooler, intake system, and essential components from oil blow-by
      $93.75
    • (0 reviews)
      # 458900303
      Universal Small Body Oil Catch Can Kit by Moroso®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $101.01 - $218.62
    • (2 reviews)
      # 152045176
      Universal Oil Catch Can 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. Carefully designed for maximum performance, is will more than just...
      Manufactured from Billet 6061 AluminumInstalls in OEM location
      $59.50 - $128.00
    • (0 reviews)
      # 458928401
      Universal PCV and Breather Kit by Earl's Performance®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $45.46 - $90.28
    • (0 reviews)
      # 459043772
      Universal Magnum Flow Pro Dry S Breather by aFe®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $26.00 - $49.00
    • (0 reviews)
      # 458946663
      Universal Oil Catch Can by Jaz®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $49.11 - $59.39
    • (0 reviews)
      # 459024649
      Universal Mini Oil Catch Can by Jaz®. 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...
      Available in black or natural colorMolded-in 1/4"-20 threaded mounting inserts
      $59.39 - $60.54
    • (0 reviews)
      # mpn358592014
      Universal Oil Catch Can by Jaz®. 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...
      Available in black or natural colorMolded-in 1/4"-20 threaded mounting inserts
      $20.55
    • (0 reviews)
      # 458932410
      Universal Rear-End Breather Kit by Longacre®. Includes vent, hardware and hose for a complete installation. Available with bracket for either 1-3/4" or 1-1/2" roll bars. Breather Diameter: 2", Height: 1-1/2". Quick professional...
      High quality at an affordable priceExpertly made from premium materials
      $42.68
    • (0 reviews)
      # 458988743
      Universal Oil Catch Can by Saldana®. Operates with 8 quarts of oil in the system. This one piece is the lightest available. The 1" internal breather tube exits the bottom, allowing the engine to breathe through the oil tank, which...
      High quality at an affordable priceExpertly made from premium materials
      $275.89 - $285.59
    • (0 reviews)
      # 120885920
      Universal Breather by Airaid®. AIRAID breather filters for valve covers are designed for the high demands of racing in mind. Made with premium filter media AIRAID breather filters offer high air flow, excellent filtration and can...
      Washable and reusableAvailable in several diameters
      $19.27 - $35.99
    • (0 reviews)
      # 458936404
      Universal Breather by Billet Specialties®. Non-Shielded. 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...
      Designed with the latest innovationsMade to ensure a high level of quality
      $32.95 - $60.95
    • (0 reviews)
      # 458993695
      Universal Catch Can by Radium®. 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 quality...
      High quality at an affordable priceExpertly made from premium materials
      $332.45 - $379.95
    • (0 reviews)
      # 458980852
      Universal Catch Can Kit by Radium®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $157.65 - $299.20
    • (0 reviews)
      # 458999673
      Universal Finned Breather Unit by Vintage Parts®. 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...
      Nostalgic LookModern Technology
      $23.74 - $71.25
    • (0 reviews)
      # mpn1055716
      Universal Pro 5 Air Filter Breather by Volant®. Volant's high performance 5 layer air filters are made of the highest quality textiles, pleated between a top and bottom aluminum screen.
      Cleanable and ReusableFive-Layers of protection
      $33.22
    • (0 reviews)
      # 286167923
      Universal Catalytic Converter by Walker®. Emissions: EPA compliant. Converter Configuration: Universal Fit. With 1 Inlet. This part features the correct load of precious metals to ensure the proper limitation of tailpipe emissions....
      Constructed to meet your vehicle’s specific emissions requirementsFeatures stainless steel body with aluminized steel pipe and heat shields
      $57.49 - $110.45
    • (0 reviews)
      # 286167897
      Universal Ultra™ Catalytic Converter by Walker®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Large Oval. With 1 Inlet. With O2 Sensor Port. Catalytic Converter Overall Length:...
      High precious metal load and high technology washcoat for premium performanceStainless steel body and aluminized body and pipe heat shields for durability
      $103.26 - $109.22
    • (0 reviews)
      # 286167639
      Universal Bullet Cat™ ECO II Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without O2 Sensor Ports. Whether your catalytic converter is...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $60.47 - $73.90
    • (0 reviews)
      # 286167631
      Universal ECO GM Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Large Round. Catalytic Converter Overall Length: 16". Keep your exhaust emissions...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $76.65 - $81.04
    • (0 reviews)
      # 286167645
      Universal Bullet Cat™ ECO III Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without O2 Sensor Ports. Whether your catalytic converter is...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $74.99 - $91.65
    • (0 reviews)
      # 286167775
      Universal Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Keep your exhaust emissions within specifications and your vehicle running in top...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $38.48 - $98.73
    • (0 reviews)
      # 286167832
      Universal QuieCat™ ECO III Resonated Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Catalytic Converter Overall Length: 18". The new...
      Baffled tube reduces sound levels by 35% without losing horsepowerHigh flow design retains maximum engine output and maximizes catalytic efficiency
      $96.49 - $100.25
    • (0 reviews)
      # mpn1233537
      Universal ECO III Stuffed Tube Catalytic Converter with EndCap by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without O2 Sensor Ports. Catalytic Inlet Diameter:...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $73.95
    • (0 reviews)
      # 286167853
      Universal Standard Stuffed Tube Catalytic Converter with EndCap by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Without O2 Sensor Ports. Whether your catalytic...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $41.99 - $42.82
    • (0 reviews)
      # 286167831
      Universal QuieCat™ ECO II Resonated Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Catalytic Converter Overall Length: 18". The new Eastern...
      Baffled tube reduces sound levels by 35% without losing horsepowerHigh flow design retains maximum engine output and maximizes catalytic efficiency
      $77.82 - $80.84
    • (0 reviews)
      # 286167741
      Universal Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Large Round. With 1 O2 Sensor Port. Catalytic Converter Overall Length: 16". Keep your...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $63.42 - $82.22
    • (0 reviews)
      # 286167833
      Universal QuieCat™ Standard Resonated Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without O2 Sensor Ports. Catalytic Converter Overall...
      Baffled tube reduces sound levels by 35% without losing horsepowerHigh flow design retains maximum engine output and maximizes catalytic efficiency
      $52.13 - $54.90
    • (0 reviews)
      # 286167714
      Universal Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Large Oval. Keep your exhaust emissions within specifications and your vehicle running in...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $64.76 - $138.89
    • (0 reviews)
      # 286167836
      Universal Catalytic Converter by Eastern®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. Keep your exhaust emissions within specifications and your vehicle running in top...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $35.97 - $82.22
    • (0 reviews)
      # 286167555
      Universal Catalytic Converter by AP Exhaust®. Converter Configuration: Universal Fit. Three-Way No / Air OBDII By Design US-EPA Compliant catalytic converters are efficient at the oxidation of HC’s and CO, and very efficient at...
      Manufactured from high quality materialsDesign meet needs of OBDII equipped vehicles
      $42.73 - $319.50
    • (0 reviews)
      # 286167591
      Universal Catalytic Converter by Bosal®. Converter Configuration: Universal Fit. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      $48.83 - $103.10
    • (0 reviews)
      # 286167901
      Universal Catalytic Converter by Bosal®. Converter Configuration: Universal Fit. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      $60.48 - $169.19
    • (0 reviews)
      # mpn1916261
      Universal Oxygen Sensor with Weld On Fittings by K&N®. Take the guess work out of tuning with this monitor. It uses an oxygen sensor to sample the exhaust gas so you'll know when the mixture is rich, lean or just right.
      High quality at an affordable priceExpertly made from premium materials
      $85.99
    • (0 reviews)
      # 405155860
      Universal Air Fuel Ratio Sensor by HKS®. Designed utilizing the latest technology, this product by HKS features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $276.95
    • (0 reviews)
      # 405155878
      Universal Wideband Oxygen Sensor by Holley®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $146.95 - $244.95
    • (0 reviews)
      # mpn620678599
      Universal Wideband Oxygen Sensor by Holley®. Designed utilizing the latest technology, this product by Holley 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
      $442.95
    • (0 reviews)
      # mpn358502453
      Universal LSU4 Bosch Wideband Oxygen Sensor by Fast®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $104.38
    • (0 reviews)
      # mpn358502480
      Universal Wideband LHA-Type Oxygen Sensor by Fast®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $251.73
    • (0 reviews)
      # 363299994
      Universal Atomic EFI Oxygen Sensor by MSD®. Designed utilizing the latest technology, this product by MSD 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
      $83.18
    • (0 reviews)
      # 152045214
      Universal Neo-Ti Aluminum Oil Catch 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. Carefully designed for maximum performance, is will...
      Manufactured from Billet 6061 AluminumBillet Aluminum machined fittings
      $89.25
    • (0 reviews)
      # mpn358504772
      Universal Direct Screw-In Breather by Peterson Fluid Systems®. 12 AN male thread to screw directly into the breather bung on Peterson Dry Sump Tanks. Can also be used on engine valve covers as a fill plug/breather, when a -12 AN...
      High quality at an affordable priceExpertly made from premium materials
      $60.54
    • (0 reviews)
      # 82368371
      Universal Remote Breather Can by Peterson Fluid Systems®. Peterson remote breather cans with internal baffeling are excellent when breathing your dry sump tank to atmosphere or running a vacuum system.
      High quality at an affordable priceExpertly made from premium materials
      $154.21 - $156.50
    • (0 reviews)
      # 82853693
      Universal 7" Single Return Drag Tank by Peterson Fluid Systems®. Their 7" drag tank has been proven in competition by Kurt and Warren Johnson to provide excellent oil control and absolutely no blowing oil.
      High quality at an affordable priceExpertly made from premium materials
      $554.77 - $769.97
    • (0 reviews)
      # mpn474702119
      Universal Chrome Push In Breather with Filter by Big End Performance®. Chrome plated steel top, High flow open element design, Push-In 1-1/4" Hole Open.
      High quality at an affordable priceExpertly made from premium materials
      $6.84
    • (0 reviews)
      # 144928612
      Universal Clamp On Breather by Big End Performance®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $11.00 - $13.93
    • (0 reviews)
      # mpn474702146
      Universal Drag Racing Crankcase Evacuation System by Big End Performance®. Reduces pressure build-up in the engine crankcase, Complete kit includes 2 Chrome Mopar style breathers, rubber grommets, check valves, tubes and clamps.
      High quality at an affordable priceExpertly made from premium materials
      $28.55
    • (0 reviews)
      # 173048458
      Universal Valve Cover Breather by Granatelli Motor Sports®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $13.30 - $56.05
    • (0 reviews)
      # 350072381
      Universal Race High Flow Catalytic Converter by Kooks®. Emissions: EPA compliant. Converter Configuration: Universal Fit. This product is made of high-quality materials to serve you for years to come. Designed using...
      Handles Exhaust Temperatures up to 1500FEliminates Emissions Related "Check Engine Light" (90% Success Rate)
      $136.81 - $142.41
    • (0 reviews)
      # 350072377
      Universal Green Ultra High Catalytic Converter by Kooks®. Emissions: EPA compliant. Converter Configuration: Universal Fit. This product is made of high-quality materials to serve you for years to come. Designed using...
      Handles Exhaust Temperatures up to 1500FEliminates Emissions Related "Check Engine Light" (90% Success Rate)
      $321.12 - $379.49




    Guides & Articles

    • 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...

    Popular Products



    Smart Car Emission Control Parts Reviews

    Average rating:  5  5 - 1 review
    5 of 5
    Excellent Filters
    Very, very good filters! The best around. Know your fitment measurements!
    ZPosted by Zachary (Martinez, CA) / June 25, 2013
    Was this review helpful for you? YesThis review was helpful for 1 user!

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