Are Spark Plugs Covered Under Warranty? Find Out the Truth!

When purchasing a vehicle, it’s important to consider the coverage provided by the car warranty. One common question is whether spark plugs are covered under warranty. The answer can vary depending on the specific warranty in question.

A powertrain warranty generally focuses on the engine, transmission, and driveline, but may not include wear-and-tear parts like spark plugs, oil filters, or air filters source. However, some manufacturers might consider certain conditions under which they may provide coverage for spark plugs.

For instance, if a premature failure occurs due to a defect in the spark plug, a manufacturer might cover its replacement under warranty. But, it’s essential to be knowledgeable about what is covered to avoid any surprises down the road source.

Are Spark Plugs Covered Under Warranty


Understanding Spark Plug Warranties

Manufacturer Warranty

When you purchase a new vehicle, the make and model often come with a manufacturer warranty. This warranty generally provides coverage for various components, but it’s important to note that some wear and tear items, like spark plugs, may be excluded.

However, certain manufacturers may offer additional add-ons that could provide coverage for components, such as spark plugs.

Extended Warranty

An extended warranty can offer longer coverage for your vehicle, often beyond its factory warranty. Similar to the manufacturer warranty, though, spark plugs may still be excluded as they are considered wear and tear items.

It’s advised to check the specific terms and conditions of your extended warranty for inclusion of spark plug coverage.

Bumper-to-Bumper Warranty

A bumper-to-bumper warranty, also known as a comprehensive warranty, covers the majority of your vehicle’s parts with a few exceptions. While it may provide more extensive coverage than other warranties, it’s common for spark plugs to still not be included in this type of warranty due to their wear and tear nature.

Nevertheless, always review the warranty terms for possible exceptions and coverage details.

Powertrain Warranty

A powertrain warranty specifically covers the vehicle’s essential components, such as its engine and transmission. In some cases, coils and spark plugs may be covered under this warranty. However, if the coil or spark plug simply reached the end of its lifespan or failed due to normal wear and tear, it’s unlikely to be covered.

To clarify spark plug coverage, consult your powertrain warranty’s terms and conditions.

Are Spark Plugs Covered Under Warranty


Factors Affecting Warranty Coverage

Wear and Tear

Warranty coverage often excludes parts designed to wear out with regular use, like spark plugs. These wear-and-tear items are typically not covered because they’re expected to be replaced after a certain period, depending on your car model and driving habits.

Materials and Workmanship

However, if a spark plug malfunctions due to poor materials or workmanship, it may fall under a warranty coverage. The manufacturer is responsible for ensuring a certain level of quality in the components they use in their vehicles, and they may cover defects related to materials or workmanship within specified warranty periods.

Vehicle’s Age and Mileage

The warranty coverage for spark plugs can vary depending on the age and mileage of your vehicle. Generally, newer cars with lower mileage have more comprehensive warranty coverages. Make sure to check your specific warranty details, as different manufacturers have different terms and conditions.

In summary, spark plugs are typically not covered by warranties due to regular wear and tear, but defects related to materials or workmanship might be covered. Warranty coverage can also vary depending on your car’s age and mileage.

Are Spark Plugs Covered Under Warranty


How to Handle Spark Plug Issues

Detecting Spark Plug Problems

If your engine is experiencing misfires or poor performance, it could be due to a spark plug issue. Some common symptoms include difficulty starting, engine misfires, decreased fuel efficiency, and rough idling. To visually inspect the spark plug’s condition, follow the steps mentioned in this guide.

Consulting with Dealership or Mechanic

Once you’ve identified a potential spark plug problem, consult with your dealership or a trusted mechanic for a professional opinion. They can help diagnose the issue accurately and recommend the best course of action. Keep in mind that spark plugs are generally not covered under warranty, as they are considered routine maintenance parts.

Submitting a Warranty Claim

In some cases, spark plugs may be covered by the manufacturer’s warranty if the issue is due to a defect in materials or workmanship within a specified period after purchase (source). To submit a warranty claim, contact your dealership or vehicle manufacturer with the necessary documentation, like proof of purchase and service records. They will assess the claim and, if approved, cover the cost of repair or replacement.

Manufacturer-Specific Warranty Policies


Ford offers a powertrain warranty that primarily covers the engine, transmission, and drivetrain. Unfortunately, wear-and-tear parts like spark plugs aren’t included in this warranty.


Similar to Ford, Kia’s powertrain warranty also excludes wear-and-tear parts such as spark plugs. Kia’s warranty mainly protects the engine, transmission, and driveline components.

General Motors

General Motors (GM) powertrain warranty policies focus on engine, transmission, and driveline protection. As with Ford and Kia, GM’s powertrain warranty excludes wear-and-tear items, including spark plugs.

Are Spark Plugs Covered Under Warranty


Additional Coverage and Benefits

Vehicle Protection Plans

Vehicle protection plans offer extended coverage beyond the manufacturer’s warranty. They come in various forms, like exclusionary coverage, which covers most car parts. It’s worth comparing different providers to find the best plan for your needs.

Some plans, like powertrain warranties, cover specific components. They typically cost less than full coverage options but may not cover all repairs. Choose wisely based on your vehicle and driving patterns.

Routine Maintenance

Routine maintenance, such as oil changes and tire rotations, is essential to keep your car running smoothly. These services are usually not covered under a basic warranty. However, some manufacturers might offer a maintenance package with the purchase of a new vehicle, providing extra peace of mind.

Investing in regular maintenance can save you money in the long run, as it prevents major repairs. Make sure to follow your car’s recommended maintenance schedule, found in the owner’s manual.

For example, replacing spark plugs, which might not be covered under warranty, can improve engine performance and fuel efficiency. If you’re unsure whether a particular service is covered, consult your warranty documentation or contact the service provider.

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Sean Mendez

Hi, I am Sean, a self-confessed petrolhead. I live in Boise, Idaho with a busy family of four and our energetic Labrador retriever. Thank you for visiting my website. You can find my email on the contact page.

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