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Spark Plug

Spark Plug

Spark Plug Buyer's Guide

What is a Spark Plug?

Spark plugs are vital to the performance of your engine and need to stay in peak form. Reinject life into your vehicle and get your wheels moving in no time by periodically replacing your vehicle’s spark plugs. AllMoparParts carries genuine Mopar spark plugs that are compatible with select model-years of the Chrysler, Dodge, Jeep, and Ram.

Maintain Peak Engine Performance With a Quality Mopar Spark Plug

A spark plug is responsible for some of the most important maneuvers in your vehicle. If an engine is what keeps a car running, then a spark plug is what keeps the engine itself running. These components emit the spark that’s needed to ignite the combustion that will jumpstart your vehicle. By powering your engine’s pistons, your vehicle stays powered up and provides a smooth ride.

As they play such an important function, your engine’s spark plugs should be kept in peak shape. Anything less than that may result in poor engine performance, cold engine starts, weak acceleration, and poor fuel economy. With continued use, these components will wear out, as some of the metal on the plugs is removed every time they fire. To ensure optimum engine performance, consider replacing your engine’s spark plugs at regular intervals.

Tips on How to Choose a Spark Plug

To get the right component for your engine, you’ll need to gather your vehicle’s specs and other pertinent information.

Obtain Vehicle Specifications

Buying the right spark plugs will depend on the specs of your vehicle. Among these include:

  • The make, model, and year

  • The type of engine and number of cylinders

  • Whether your vehicle has manual (standard) or automatic transmission

  • Engine displacement (or how much room is left in each cylinder when the piston reaches its lowest point)

  • The kind of fuel system

  • The spark plug gap

  • The part number for your vehicle’s spark plugs


Finding the best spark plugs for your vehicle will depend on its specifications. By supplying your VIN number, you can confirm whether a plug is compatible with your vehicle’s make, model, and model-year. A VIN number is a unique code assigned to specific automobiles. Alternatively, you could check your vehicle’s manual to see if it lists down any part numbers.

Should You Repair or Replace?

For any car care matters, it’s best to follow the service intervals recommended by your manufacturer. Since the part doesn’t wear out easily, you could get 80,000 miles on them before they need replacement. The timing of your replacement could depend on several factors, such as performance, longevity, oil leaks, and frequency of use. This is why some automakers suggest replacing the part every 30,000 miles. 

Worn out spark plugs could also trigger your engine light to come on. A flashing engine light could result in misfires under the hood, putting your vehicle at risk of rough idling, uneven acceleration power, and higher exhaust emissions. If you start to notice these symptoms, get your vehicle checked out with an engine tune-up.

How to Install Spark Plugs

  1. Obtain the tools necessary for spark plug replacement. These include a socket, torque wrench, ratchet, extension, and gap gauge.

  2. Start by removing the air cleaner assembly on the top of the engine. 

  3. Once it’s been removed, blast compressed air around the ignition coils to prevent dirt from falling into the cylinder when you remove the plugs.

  4. Remove the ignition coil and/or boot by grasping the wire by the boot, rotating it, then pulling it out.

  5. Unscrew each plug using a spark plug socket, ratchet, and extension. Make sure you use the right size socket over the plug. Rotate the plug counterclockwise to loosen it.

  6. Check and adjust the spark plug gap based on your manufacturer’s specifications.

  7. Apply a thin coat of anti-seize compound to the plug threads before installing the new plugs.

  8. Use a torque wrench and follow spark plug torque specs when installing the new plug.

  9. Apply a think coating of dielectric grease around the inside of the spark plug boot.

  10. Repeat the procedure for the remaining plugs. Once done, reinstall the ignition coil, hold-down bolt, coil electrical connector, and air cleaner.

Frequently Asked Questions

Here are the frequently asked questions about Spark Plugs:

How long do spark plugs last?

Spark plugs are heavy-duty spare parts that don’t wear out easily. This doesn’t mean they’ll last forever, though. Most of them have a factory service interval of up to 100,000 miles. Long-life platinum and iridium ones can last up to 120,000 miles if your engine doesn’t use oil or spend too much time in idle mode.

Any tips on how to change spark plugs?

Start by gathering the tools you need and cleaning the area around your plugs. Depending on your system, remove the spark plug wires or disconnect its coils. Then, remove the plug and adjust the gap on the new one before installation. Once it’s been reinstalled, you can reattach the plug wires or insert the ignition coil. Repeat the process until all the plugs have been installed.

How often should I change my spark plugs?

If you’re using an older or high-performance vehicle, your plugs may need to be changed every 20,000-30,000 miles. If you drive at moderate speeds, the ideal time to schedule a replacement would be when you reach 40,000 miles. If you’re using a newer vehicle, it may last from 60,000-120,000 miles before needing a replacement.

Shop for Mopar OEM Spark Plugs at AllMoparParts

Changing your spark plugs at regular intervals ensures that your vehicle is running as smoothly and efficiently as possible. If you start to notice potential red flags, such as your engine idling roughly or your car failing to accelerate quickly, you might be due for a replacement. When that happens, shop for genuine spark plugs at AllMoparParts.

We carry an array of premium Mopar spark plugs that are compatible with various engines, including 2.0L/2.4L and 1.4L/1.6L engines. As for makes and models, our spark plugs are compatible with select model-years of the Viper, Journey, Dart, and other Dodge models; select model-years of the Promaster City, 3500, 2500, and other Ram models; select model-years of the Renegade, Compass, Patriot, and other Jeep models; and select model-years of the Chrysler 200 and 300. 

Just supply your VIN number with your order so that we can confirm if the spark plug is compatible with your vehicle’s make, model, and year.