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Spark Plug

A bad spark plug can reduce your gas mileage, cause your engine to backfire, and even damage key engine components. Replace it immediately to keep your vehicle in top condition. Browse our wide selection of replacement spark plugs at unbeatable prices here at CarParts.com. All our products are made by the most trusted brands in the industry. Check out our spark plugs today to find the perfect part for your vehicle.

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6953 V-Power Series Spark Plug, Sold individually
Part Number: NG6953
0 Reviews
Vehicle Info Required to Guarantee Fit
$7.49
Product Details
Notes : Semi-Surface Gap; Ships to U.S. addresses only. Cannot be shipped internationally.Series : V-Power SeriesSpark Plug Code : BKR5E-11Electrode Tip Material : Nickel alloy Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
2164 NGK Regular Class Multi-Ground Spark Plug, Sold individually
Part Number: NG2164
0 Reviews
Vehicle Info Required to Guarantee Fit
$8.99
Product Details
Notes : Triple Electrode; Ships to U.S. addresses only. Cannot be shipped internationally.Series : Regular Class Multi-Ground SeriesSpark Plug Code : BCPR7ETElectrode Tip Material : Platinum Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
3248 Platinum Series Spark Plug, Sold individually
Part Number: NG3248
0 Reviews
Vehicle Info Required to Guarantee Fit
$8.49
Product Details
Notes : 1.25 mm Thread Pitch; 16 mm Hex Size; 0.6 mm Projected Fine Wire Platinum Center Electrode; 5000 Ohms Resistance; (1) Standard Trapezoid Nickel Ground Electrode; Gasket Seat Type; Solid Terminal TypeSeries : Platinum SeriesElectrode Tip Material : Platinum Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
4043 NGK V-Power Spark Plug, Sold individually
Part Number: NG4043
0 Reviews
Vehicle Info Required to Guarantee Fit
$789.99
Product Details
Notes : Semi-Surface Gap; Ships to U.S. addresses only. Cannot be shipped internationally.Series : V-Power SeriesSpark Plug Code : ZFR4F-11Electrode Tip Material : Nickel alloy Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
4471 NGK Regular Class Multi-Ground Spark Plug, Sold individually
Part Number: NG4471
0 Reviews
Vehicle Info Required to Guarantee Fit
$15.49
Product Details
Notes : Dual Electrode Platinum; Ships to U.S. addresses only. Cannot be shipped internationally.Series : Regular Class Multi-Ground SeriesSpark Plug Code : LKR8APElectrode Tip Material : Platinum Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
5368 Laser Iridium Series Spark Plug, Sold individually
Part Number: NG5368
0 Reviews
Vehicle Info Required to Guarantee Fit
$17.99
Product Details
Notes : 1.25 mm Thread Pitch; 16 mm Hex Size; 0.6 mm Projected Fine Wire Iridium Center Electrode; 5000 Ohms Resistance; (1) Standard Platinum Ground Electrode; Gasket Seat Type; Solid Terminal TypeSeries : Laser Iridium SeriesElectrode Tip Material : Iridium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
6441 Iridium IX Series Spark Plug, Sold individually
Part Number: NG6441
0 Reviews
Vehicle Info Required to Guarantee Fit
$13.49
Product Details
Notes : Iridium Long Life; Ships to U.S. addresses only. Cannot be shipped internationally.Series : Iridium IX SeriesSpark Plug Code : ZFR6FIX-11Electrode Tip Material : Iridium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
7293 Iridium IX Series Spark Plug, Sold individually
Part Number: NG7293
0 Reviews
Vehicle Info Required to Guarantee Fit
$13.99
Product Details
Notes : 1.25 mm Thread Pitch; 21 mm Hex Size; 0.6 mm Projected Fine Wire Iridium Center Electrode; 5000 Ohms Resistance; (1) Standard Taper Cut Nickel Ground Electrode; Gasket Seat Type; Solid Terminal TypeSeries : Iridium IX SeriesElectrode Tip Material : Iridium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
90220 Ruthenium HX Series Spark Plug, Sold individually
Part Number: NG90220
0 Reviews
Vehicle Info Required to Guarantee Fit
$16.49
Product Details
Notes : 1.25 mm Thread Pitch; 16 mm Hex Size; 0.6 mm Projected Fine Wire Ruthenium Center Electrode; 5000 Ohms Resistance; (1) Fine Wire Platinum Ground Electrode; Tapered Seat Type; Solid Terminal TypeSeries : Ruthenium HX SeriesElectrode Tip Material : Ruthenium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
90288 Laser Iridium Series Spark Plug, Sold individually
Part Number: NG90288
0 Reviews
Vehicle Info Required to Guarantee Fit
$23.99
Product Details
Notes : 14 mm Hex Size; 51 mm Insulator Height; 5000 Ohms Resistance; (1) Standard Ground Electrode; Non-Removable Nut Electrical Terminal; Nickel Ground Electrode Core; DFE Ground Electrode Tip; Flat Seat TypeSeries : Laser Iridium SeriesElectrode Tip Material : Iridium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
90374 Laser platinum Series Spark Plug, Sold individually
Part Number: NG90374
0 Reviews
Vehicle Info Required to Guarantee Fit
$15.49
Product Details
Notes : 1.25 mm Thread Pitch; 16 mm Hex Size; 1 mm Projected Fine Wire Platinum Center Electrode; 5000 Ohms Resistance; (1) Standard Platinum Ground Electrode; Tapered Seat Type; Solid Terminal TypeSeries : Laser platinum SeriesElectrode Tip Material : Platinum Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
90465 Ruthenium HX Series Spark Plug, Sold individually
Part Number: NG90465
0 Reviews
Vehicle Info Required to Guarantee Fit
$16.49
Product Details
Notes : 1.25 mm Thread Pitch; 16 mm Hex Size; 0.6 mm Extended Projection Fine Wire Ruthenium Center Electrode; 5000 Ohms Resistance; (1) Projected Square Platinum Ground Electrode; Gasket Seat Type; Solid Terminal TypeSeries : Ruthenium HX SeriesElectrode Tip Material : Ruthenium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
90495 Ruthenium HX Series Spark Plug, Sold individually
Part Number: NG90495
0 Reviews
Vehicle Info Required to Guarantee Fit
$16.49
Product Details
Notes : 1.25 mm Thread Pitch; 16 mm Hex Size; 0.6 mm Extended Projection Fine Wire Ruthenium Center Electrode; 5000 Ohms Resistance; (1) Projected Square Platinum Ground Electrode; Tapered Seat Type; Solid Terminal TypeSeries : Ruthenium HX SeriesElectrode Tip Material : Ruthenium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
90565 Laser Iridium Series Spark Plug, Sold individually
Part Number: NG90565
0 Reviews
Vehicle Info Required to Guarantee Fit
$22.99
Product Details
Notes : 1.25 mm Thread Pitch; 14 mm Hex Size; 0.6 mm Projected Fine Wire Iridium Center Electrode; 5000 Ohms Resistance; (1) Fine Wire Taper Cut Platinum Ground Electrode; Gasket Seat Type; Solid Terminal TypeSeries : Laser Iridium SeriesElectrode Tip Material : Iridium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
91006 Laser Iridium Series Spark Plug, Sold individually
Part Number: NG91006
0 Reviews
Vehicle Info Required to Guarantee Fit
$19.49
Product Details
Notes : 1.25 mm Thread Pitch; 16 mm Hex Size; 0.6 mm Projected Fine Wire Iridium Center Electrode; 1000 Ohms Resistance; (1) Standard Taper Cut Platinum Ground Electrode; Gasket Seat Type; Cup Terminal TypeSeries : Laser Iridium SeriesElectrode Tip Material : Iridium Electrode TipQuantity Sold : Sold individuallyWarranty : 60-day NGK limited warranty
Page 1 of 66 | Showing 1 - 15 of 980 results

Spark Plug Customer Reviews

Hey you guys sent me the wrong spark plugs I ordered three spark plugs for 350 Z Nissan 2008 HR engine The part number is (LKAR7BIX-11S Number 93501 but you guys sent me ZFR6FIX-11 number 6441 So would like to talk to someone to resolve this problem
Henry Martinez
VERIFIED PURCHASER
Purchased on Jun 02, 2020
Got exactly what I ordered. Save a couple bucks too
Dameon T Canary
VERIFIED PURCHASER
Purchased on May 05, 2020
I recently replaced my engine and put NGK spark plugs v power and what a difference it made. Faster start ups and better performance in the car. I recommend these spark plugs to anyone out there. For the price it was definitely worth it because the Toyota dealership would of charged me double the price for the same spark plugs, so I saved a lot.
Purchased on Dec 15, 2009

Spark Plug Guides

Spark Plug Buyer's Guide

Summary

  • A spark plug is one of the first components that activates in your car the moment you press the ignition switch.
  • Spark plugs ignite the gasoline and air that are supplied in the combustion chambers.
  • A spark plug is a small device typically made of high-nickel alloys, aluminum oxide ceramic, and steel wire.
  • A spark plug also acts as a heat exchanger.
  • A typical spark plug has at least eight subparts: two electrodes, an insulator tip, threads, a gasket, shell, insulator, and a terminal.
  • There are four types of spark plugs: copper, iridium, platinum, and double platinum.
  • The most common spark plug issue is a fouled spark plug due to grime deposits, which can happen if there’s always oil on the spark plug.
  • A bad spark plug can lead to poor fuel economy, lack of power especially during acceleration, difficulty starting, misfire, and bad idling behavior.
  • A spark plug replacement costs from $9 for a single piece, to up to $112 for a set of eight.

A spark plug is one of the first components that activates in your car the moment you press the ignition switch. It will work constantly for as long as your engine is running. 

Spark plugs ignite the gasoline and air in the combustion chambers. This buyer’s guide will help you pick the best replacement spark plug for your vehicle.

What is a spark plug?

A spark plug is a small device typically made of high-nickel alloys, aluminum oxide ceramic, and steel wire. It's one of a vehcile's smallest but most crucial components. Spark plugs mount right on top of the cylinder and are crucial for giving your engine the spark it needs to ignite the fuel as it's compressed. The spark plug does this by creating a tiny arc of electric charge between the two electrodes found on its tip.

A spark plug also acts as a heat exchanger. It absorbs excessive thermal energy and passes it to the cooling system.

How does a spark plug work?

A typical spark plug has at least eight subparts: two electrodes, an insulator tip, threads, a gasket, shell, insulator, and a terminal. The assembly hooks up to a high-voltage power source, which is the ignition coil. The electric current coming from the coil causes a voltage difference between the center and side electrodes, leading to a spark.

Before a spark is born in between the two electrodes, the gas between the gap needs to get ionized. For this to happen, the voltage needs to surpass the dielectric strength of the gas. This can only happen as the voltage rises. Ionized, the gas can now act as a conductor and allow the electrons to transfer from one electrode to the other, forming an arc across the gap. The gas then expands as the temperature in the spark channel rises and causes a small explosion.

Combustion happens when the small explosion caused by the expanding gases in the spark channel comes in contact with the compressed fuel and air mixture. A larger ball of fire takes place, which pushes the piston down so that the process can start again. Spark plugs must be rigid and heat-resistant, because this process repeats thousands of times in a single minute.

Types of spark plugs

There are four types of spark plug: iridium, copper, platinum, and double platinum. 

Copper Spark Plugs

Copper is an old spark plug material, although quite a number are still being sold. This type features a core mostly made from copper, with nickel alloy as its central electrode. This small subcomponent is its weakness, as nickel alloy isn't as durable compared to other types of metal.

Copper spark plugs should last around 20,000 miles. If they fail too soon, it might be a sign that you need to check the condition of related parts and systems. The way you drive your vehicle, the roads or terrain you typically drive on, and your vehicle's model can all impact the actual lifespan of your copper spark plugs.

Copper spark plugs don't last for very long. They work best when used in older vehicles, as these old cars don’t need a high electrical supply.

Platinum Spark Plugs

Platinum spark plugs also feature a copper core. But copper spark plugs have nickel alloy tips instead of a platinum disc found on platinum spark plugs. Platinum is harder than nickel alloy, with a melting point of up to 3,215 degrees Fahrenheit.

If your car features an electronic distributor-based or distributorless ignition system (DIS), we recommend that you use a platinum spark plug. 

Double-Platinum Spark Plugs

A double platinum spark plug has an additional platinum disc on the bottom of the side electrode. This reinforces the side electrode, like a platinum cap strengthens the copper core. Double-platinum spark plugs allow the spark to jump back from the side electrode to the central electrode. The platinum on the side electrode enables it to handle reverse spark. The return of spark is crucial if you have a wasted-spark DIS.

If your car's already using a double-platinum spark plug, don’t try to downgrade to a single platinum plug. Single platinum plugs lack a side electrode that can handle a reverse spark.

Iridium Spark Plugs

Iridium is harder than copper and platinum, so expect iridium spark plugs to last the longest. These feature a fine iridium tip welded onto the fine wire electrode core. They're some of the best spark plugs on the market. There’s also a variety with a platinum disc welded on the side electrode for coil-on-plug (COP) system compatibility.

Given the size of the iridium material, this spark plug doesn’t require huge voltage to generate a spark. This means that they're more efficient than other types. The only downside is that iridium is an expensive metal. Even after reducing the electrode size to as little as 0.4 mm, aniridium spark plug is still the most expensive option.

What causes a bad spark plug?

Spark plugs can fail because of several reasons. If there’s always oil on the spark plug, this part can be fouled by grime deposits. When spark plugs fail, you will experience multiple performance and comfort issues with your vehicle.

To learn more about cleaning a spark plug, read our article.

A bad spark plug can lead to poor fuel economy, lack of power, especially during acceleration, difficulty starting, misfire, and bad idling behavior. If you notice some of these symptoms, have your car checked by a certified mechanic as soon as possible.

Choosing the Right Spark Plug

Selecting the right spark plug is a crucial decision. Here are some things that you should consider. 

What to look for in your spark plug?

Durability dictates the lifespan of your spark plug. You won't get your money's worth if it isn't made to withstand wear and tear.

Fit will dictate the ease of your installation process. Installing a spark plug isn't compliacted, as long as you buy one that matches your vehicle's specific make and model.

Copper vs Platinum vs Iridium

Which of these three is the best material for your spark plug? Here's a list of the melting points and lifespan of each material:

Copper
  • Melting point: 1, 983 degrees F
  • Lifespan: 15, 000 - 20, 000 miles
Platinum
  • Melting point: 3, 222 degrees F
  • Lifespan: 30, 000 - 60, 000 miles
Iridium
  • Melting point: 4, 229 degrees F
  • Lifespan: 60, 000 - 100, 000 miles

Buy a copper spark plug if you want one that's a good electric conductor. Platinum or iridium spark plugs will last longer.

If you're looking for information about how to change apark plugs, you may read our article here.

How much are spark plugs?

CarParts.com sells some of the most affordable and reliable OE spark plug replacements on the market. A spark plug replacement can cost from $9 for a single piece, while a set of eight can cost $112. Enter your vehicle’s year, make, and model into our vehicle selector to find the most compatible spark plugs for your vehicle.

Helpful Automotive Resources

P0354 Code: Ignition Coil “D” Primary/Secondary Circuit
P0354 Code: Ignition Coil “D” Primary/Secondary CircuitThere are several types of ignition systems, including a distributor, coil pack, or coil on plug (COP) type systems. Typically, code P0354 is set in a COP system. There are several types of ignition systems, including a distributor, coil pack, or coil on plug (COP) type systems.
Why Won’t My Car Start?
Why Won’t My Car Start?Unfortunately, the answer isn’t always straightforward. You might be surprised to find out how many issues can potentially prevent your car from starting. Common Reasons Why Your Car Might Not Start
P0316 Code: Engine Misfire Detected on Startup (First 1000 Revolutions)
P0316 Code: Engine Misfire Detected on Startup (First 1000 Revolutions)Here’s everything you need to know about code P0316. If one of your engine’s cylinders misfire during the engine’s first 1,000 revolutions, it may trigger code P0136. What Does the P0316 Code Mean?
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