Do you know what's the most common reason for catalytic converter failure? Usually it's all because of worn-out spark plugs. This component helps your vehicle run properly, while the damaged unit can cause a lot of troubles such as excessive fuel consumption and sluggish performance. The only way to check whether a spark plug needs replacement is by visual examination. As soon as you notice any visual damage, don't hold up and get a new plug.

Featured Products

  • Autolite® Spark Plug Set
    (6 reviews)
    # sp5159
    Spark Plug Set by Autolite®. This spark plug by Autolite is specially designed and manufactured to ensure quick starts, dependable performance, and smooth acceleration. The product is made of premium materials to ensure extreme...
    $4.32 - $9.60
  • NGK® Spark Plug
    (7 reviews)
    # sp5154
    Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology.
    $2.57 - $23.54
  • Champion® Copper Plus Spark Plug Set
    (0 reviews)
    # sp5193
    Copper Plus Spark Plug Set by Champion®. As the leaders in precious metal technologies as well as F.I.S.S resistor technology and MLR™ technology, Champion spark plugs provide enhanced ignition and longer life.
    $2.32 - $9.29
  • NGK® Laser Platinum™ Spark Plug
    (4 reviews)
    # sp5198
    Laser Platinum™ Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology.
    $7.85 - $16.90
  • Motorcraft® Spark Plug
    (2 reviews)
    # sp1772
    Spark Plug by Motocraft®. If you need to replace your worn-out spark plugs, Motorcraft is the way to go. Engineered specifically for your vehicle, their high melting point provides outstanding resistance to erosion while...
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  • NGK® Iridium IX™ Spark Plug
    (1 reviews)
    # sp5201
    Iridium IX™ Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology.
    $8.83 - $10.26
  • Champion® Platinum Power Spark Plug Set
    (1 reviews)
    # sp5196
    Platinum Power Spark Plug Set by Champion®. As the leaders in precious metal technologies as well as F.I.S.S resistor technology and MLR™ technology, Champion spark plugs provide enhanced ignition and longer life.
    $3.40 - $10.42
  • Bosch® OE Specialty Spark Plug
    (0 reviews)
    # sp5886
    OE Specialty Spark Plug by Bosch®. Replace your worn out spark plugs with Bosch spark plugs and experience miles of worry-free driving. OE Specialty Spark Plugs ensure safe and reliable performance, same as your OE plugs, so you...
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  • Denso® Spark Plug
    (4 reviews)
    # sp4667
    Spark Plug by Denso®. Denso Double Platinum plug features platinum on both the center and ground electrodes. This precious metal fights corrosion and erosion, ensuring superior spark performance and maximum spark plug life capable...
    $2.08 - $35.34
  • NGK® V-Power™ Spark Plug
    (2 reviews)
    # sp5202
    V-Power Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology.
    $2.63 - $7.22
  • Champion® Double Platinum Spark Plug Set
    (3 reviews)
    # sp5194
    Double Platinum Spark Plug Set by Champion®. As the leaders in precious metal technologies as well as F.I.S.S resistor technology and MLR™ technology, Champion spark plugs provide enhanced ignition and longer life.
    $7.12 - $40.50
  • NGK® Laser Iridium™ Spark Plug
    (2 reviews)
    # sp5197
    Laser Iridium™ Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology.
    $9.03 - $28.95
  • Champion® Iridium Spark Plug Set
    (1 reviews)
    # sp5195
    Iridium Spark Plug Set by Champion®. As the leaders in precious metal technologies as well as F.I.S.S resistor technology and MLR™ technology, Champion spark plugs provide enhanced ignition and longer life.
    $7.98 - $27.45
  • NGK® G-Power™ Spark Plug
    (0 reviews)
    # sp5200
    G-Power Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology.
    $4.11 - $8.43
  • NGK® Standard Spark Plug
    (0 reviews)
    # sp5199
    Standard Spark Plug by NGK®. NGK manufactures all types of spark plugs and glow plugs featuring the latest in technology.
    $2.57 - $10.02
  • Victor Reinz® Spark Plug Tube Seal Set
    (0 reviews)
    # sp5584
    Spark Plug Tube Seal Set by Victor Reinz®. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high...
    $1.35 - $33.97
  • AJUSA® Spark Plug Tube Seal
    (0 reviews)
    # sp5325
    Spark Plug Tube Seal by AJUSA®. If you are looking for quality sealing solutions, AJUSA offers you various replacement products from seals and bolts to O-Rings and dowel pins. Engineered using the latest technologies and global...
    $2.60 - $2.64


Featured Brands

As always, CARiD stores any and all replacement spark plugs available on the market - copper, platinum, iridium plugs and much more! Full throttle response, better fuel efficiency, and reduced emission levels are only couple of benefits you'll get with a new part. By getting new plugs with us, you can also enjoy our affordable prices, fast shipping and excellent follow-up service.

Before making a replacement, let's first learn how a spark plug functions. The part consists of several elements: the terminal, insulator, body, and two electrodes (center electrode and ground). Screwed into the cylinder head, the plug provides a spark which is required to ignite the air-fuel mixture. The plug also operates like a heat exchanger as it removes any excessive heat from the combustion chamber. Day after day, the plugs must cope with high pressures, extreme temperatures and constant vibration. And even though they are designed to withstand that, wear and tear is inevitable.

The spark plugs never fail all of a sudden, instead they gradually wear out. And that is why it's a good idea to know why and how fast spark plugs get damaged. It happens that the engine stumbles and then it doesn't start at all. Sometimes the engine might run and then misfire. The damaged spark plug is likely the culprit. There are various reasons for the failure. The engine condition, the purity of the fuel you usually use, and even the way you drive affect the useful life of the items. Oil buildup, carbon and combustion deposits, lean air/fuel mixtures can all lead to the plug damage. When it happens, let CARiD set your mind at ease and offer the first-class replacements.

Let's find out how often your spark plugs need inspection and replacement. Well, every 30,000 miles is a normal baseline. But remember that vehicles have different requirements, and the spark plugs may stay healthy for 100,000 miles or even more. Yet when the time comes, just remove the plug and visually examine it. Should you notice glazing, white deposits or excessive electrode wear, the time has come for replacement. It is an easy job to do if you can remove the plugs. But if you are not mechanically inclined or feel like it's a bit complicated task, then visit the nearest auto repair center.

Here they are - the reasons why you need to change your old plugs. The number one reason is that the new parts maintain high engine performance and efficiency. New plugs also improve cold starting, which allows the engine to effortlessly start in the coldest weather. The third 'why' is that the new spark plugs minimize the risk of the catalytic converter failure. Well, now you see that spark plugs should be replaced when damaged or worn-out. Fix the problem as soon an possible with the repair parts that we've gathered for you at CARiD.

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Guides & Articles

  • Auto Repair Parts
    This article will guide you through a generic tune up on most any car or light duty gasoline-powered vehicle built within the last 20 years or so. We will presume that you are tuning up your engine because it has reached the mileage or time point to do so, and that you are NOT performing a tune up to cure an engine performance defect. We make this distinction because not all running/performance issues will be solved via a simple tune up.
  • Auto Repair Parts
    Since the dawn of the automobile, spark plugs have been an integral part of gasoline engines because they conduct the electrical energy from a vehicle’s ignition system needed to finalize the combustion process. After the gas/air mixture has been fully compressed inside the cylinder head, spark plugs serve a miniature bolt of lightning to create an explosion which pushes a piston downward.

Spark Plugs Reviews

Average rating:  5  4.8 - 59 reviews
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5 of 5
E3 Sparks Plugs
They look great and the three prong concept can only improve spark strength.
NPosted by Neal (Washington Boro, PA) /
1965 Buick Skylark
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