Spark Plug Replacement Cost – Best Price Estimate

The engine of your car can be a powerful force. But without the spark plugs igniting the air-fuel mixture inside your cylinders to create combustion, you wouldn’t have the engine power needed to drive down the road and make it up steep mountain passes.

Spark plugs are critical to your vehicle’s health. Make sure you change your spark plugs regularly because although it won’t cost a lot to do so, it is crucial that they must be changed often. Spark plugs should never be overlooked! If you are wondering how much spark plug replacement cost. You have come to the right place.

Spark plug replacement costs between $190-$260. This includes labor costs that range from $130 to $160 and parts and accessories, which can be priced between $60 and $90. 

Spark plug replacement cost depends on the number of spark plugs in your vehicle, how complex the process is, and what car it is. 

Read on to know more about spark plug replacement and how you can save on spark plug replacement.

What Are Spark Plugs?

The ignition system in your car is responsible for ensuring that the car’s engine fires up every time you turn it on. The ignition system consists of various devices such as your distributor, ignition coil, and spark plugs. 

Spark plugs are crucial components of the system; they provide a spark to the fuel mixture and air that flows through the engine when you drive your car. 

Spark plugs are small devices on top of each cylinder head that ignite gasoline contained within cylinders while they’re still inside, so an explosion will occur. This happens every time you start your car.

A car’s engine can’t run without spark plugs! Some engines usually have either two or four spark plugs. The more powerful the engine, the more spark plugs there will be. 

The amount of power an engine can generate depends heavily on the durability and performance of your car’s spark plugs. If they’re not performing at optimal levels, you may experience significant problems in the vehicle.

The spark plugs of your car are essential for it to run properly. Imagine yourself trying to start the car engine, but it can’t seem to catch because of a lack of spark. 

You would have no way of knowing what the problem is or what you might do about it other than check all aspects of the car engine! 

This lack of spark could mean your vehicle won’t start at all, or it could essentially cause issues such as inefficient fuel consumption and decreasing acceleration. 

Therefore, you must change your car spark plugs regularly so that your vehicle performs in peak condition with high efficiency and speedy acceleration.

How Often Do You Need To Change Your Spark Plugs?

Your spark plug should be replaced at least once every 20,000-30,000 miles. However, how often you replace your spark plugs will depend on many factors, including how often you drive your car and the make and model of your vehicle.

A recommendation from your car manufacturer can be found in the owner’s guide that you keep in your glove box.

Your spark plug needs to be replaced when you’ve driven 20,000 – 30,000 miles. Notice that this has nothing to do with a time interval, as we’re just saying it in the form of a rule of thumb.

However, several other factors affect how often you replace your spark plugs, such as the make and model of your car and how often you drive your vehicle. Your owner’s manual contains a recommendation from the manufacturer as to when replacements should be made based on those variables.

To ensure your spark plugs don’t stop working, you can either pay a mechanic to check them or check them yourself. You should replace your spark plugs if they appear worn. Similarly, be aware of signs that tell you it’s time to get new spark plugs.

Also Read: Tie Rod Replacement Cost

Symptoms Of Bad Spark Plugs

Symptoms Of Bad Spark Plugs
Credits: Smile Fight / Shutterstock

​These are signs that your spark plugs may have gone bad.

1. Car Won’t Start

A dead battery often causes your vehicle not to start. Often, spark plugs can cause this problem as well. If you’re experiencing difficulties starting up your engine, it may well be due to worn-out or clogged sparkplugs, which can cause your motor to work harder than normal.

In winter or freezing weather conditions or high levels of moisture such as rain, the spark plugs in your car might not be able to create a strong enough spark to start the vehicle if it is bad.

2. The Engine Is Not Working

If a car has a misfire, it is usually caused by a faulty ignition coil, damaged plug caps, or low-quality fuel. One of the spark plugs may also be damaged, and this will usually affect the whole engine.

The car will slow down then speed up again, and it may pop when it loses/regains its timing. The vehicle can misfire, which causes raw fuel to go into the exhaust system and eventually damage the catalytic converter.

3. Poor Fuel economy For The Car

As a car engine burns fuel, its spark plugs must be regularly replaced to ensure efficiency. If your existing plugs have begun to wear, they will no longer be capable of effectively burning fuel in the combustion chamber, and as a result, you’ll feel the effects by using more fuel.

4. Idle Rough Engine

If you hear the rattling or knocking sound coming from your engine, you might want to check if your spark plugs need replacing.

5. Car Acceleration Problem

When a spark plug wears, the spark is insufficient or can even be nonexistent. This will not allow the fuel-air mixture to combust and provide the proper power for your car, which means it won’t be able to accelerate properly.

6. The Engine Is Really Loud

When one of the spark plugs starts to get older, it so happens that other spark plugs start to overwork to compensate for the deteriorated spark plug. This is why you might start hearing rattling or other hums in your engine.

7. Your ‘Check Engine Light Is On

Though your vehicle may not be due for a service just yet, it will alert you to any potential issues. Pay attention to the check engine light, and when on journeys, keep an additional eye out for warning signals – like misfire that might be caused by bad spark plugs, needing additives for oil, or fuel gauge that gets stuck at 0.

It’s better to deal with more minor problems sooner than later because they’ll potentially get more expensive if left unchecked!

If you notice more than one of these symptoms, the problem could be a faulty spark plug. This damages your engine. Replacing the spark plugs should eliminate these symptoms.

Spark Plug Replacement Cost

The cost of spark plug replacement will vary depending on how many spark plugs are in your vehicle and the complexity of the process.

If you’re looking to replace your spark plugs, expect to pay anywhere between $190-$260. This may include labor costs ranging anywhere from $130 – $160 and part/accessories costs that fall around the $60 – $90 range.

It’s not a huge investment, especially considering how important spark plugs are to your car’s performance. The amount of miles on your car is directly related to when you need to change your spark plugs.

If you keep your car for many years, then you may only need to replace the spark plugs once or twice during that time – depending on if the ca is driven on a regular basis and under normal conditions, of course.

Benefits Of Changing Out Your Spark Plugs

Regularly replacing spark plugs will help your vehicle to start up much easier. Being assured that your spark plugs are in top shape is essential to make sure you can trust that your car is working properly at all times.

Like your vehicle’s engine, spark plugs are the most vulnerable to wear and tear. While there may be many parts that help with starting the car, these specific ones will show signs of wear far more quickly than others. You don’t want to end up stranded on the side of the road someday simply because you didn’t want to spend a little bit of money on replacements!

What Are The Consequences Of Not Replacing Spark Plugs?

It’s important to replace your spark plugs if they are old and worn. People will see warning signs while driving their cars – but ignore them. They keep driving with bad spark plugs until, over time, their car’s engine is damaged.

Even in the best-case scenario, if your spark plugs are worn down and corroded, you could find that your fuel economy is bad. This means you’ll be out of pocket when it comes to paying more at the pump.

To keep things running smoothly, you’ll want to replace them as soon as possible! Making a terrible situation even worse is when spark plugs cant produce any sparks to ignite the engine – this means that instead of the air inside your engine igniting so it can produce power for all working parts, the engine will be silent.

You won’t get very far without spark plugs or an efficient way to ignite the fuel, so we suggest replacing those old ones right away to avoid these problems.

Can I Replace Spark Plugs By Myself?

The good news is that spark plug replacement is not a difficult task. If you can’t afford to have your vehicle serviced at a service center and/or don’t have the proper finances or monetary resources, you can replace them yourself if you can obtain the tools required. You will need to use the tools such as a gap gauge, a swivel socket, and needle-nose pliers.

Replacing your spark plugs yourself will allow you to save some time and money. If you’re handy with a wrench, this is the way to go. Mechanics usually charge much more money for this sort of thing, so skip paying them extra if they’re not performing any other maintenance on your vehicle at the time you take it in for spark plugs!

How Long Does Spark Plug Replacement Take?

It doesn’t matter if you decide to change your spark plugs yourself or hire someone to do it; it is important to know how long the process will take. It can be difficult to answer this question because different cars have different times between changing spark plugs.

On average, it takes a mechanic around two to three hours to replace spark plugs, but of course, there are certain other factors that could affect how long the whole thing takes, for example, the number of spark plugs your engine has.

Also Read: Timing Chain Replacement Cost

How To Replace Spark Plugs

Follow these steps to properly replace your car’s spark plugs

  1. Disconnect the negative battery terminal.
  2. Remove any covers, if necessary.
  3. Clean the area around the spark plugs before replacing them. Sparkplug problems and engine misfires can be caused by a lack of interaction between connectors due to dirt. In some cases, cleaning the connectors can solve the problem.
  4. Check for oil buildup and signs of fouling to determine if the sparkplug is worn out or fouled. A new plug will usually be brighter than an older plug.
  5. After determining that the spark plugs have worn out, remove them and inspect the engine heads in which the plugs were installed. Also, check the ignition wires and compression.
  6. Apply anti-seize to the threading of plugs and then install new plugs in the vehicle.
  7. Perform an engine test to make sure that the vehicle runs smoothly and starts properly.

Here is a video guide on how to replace your spark plugs

Is Spark Plug Replacement Worth It?

Spark plug replacements cost a lot less than car repairs these days, so they’re definitely worth the investment if you do them yourself. In many cases, most people can get their spark plugs changed by mechanics under $200. Spark plug replacements are a smart choice when it comes to keeping your vehicle in good order, as they can improve fuel economy and help minimize wear and tear on your engine.

Below are some things remember when you have to replace spark plugs:

  1. Spark plug wear can be increased by driving at high speeds. If you drive the car in extreme conditions, it is worth performing an earlier inspection and tune-up.
  2. Even if the plugs seem to be working well, it is important that they are replaced promptly according to the manufacturer’s maintenance schedule.
  3. Spark plug wires, which are different from coil-on-plug systems, should be replaced. This could increase the cost of your repair.
  4. You may also need to replace your ignition coils as you replace your spark plugs; this will increase the overall cost.
  5. For some engines, it is necessary to remove the intake manifold and replace the spark plugs. This can increase labor and parts costs.
  6. Problems with ignition systems may arise from leaking valve cover gaskets that have allowed oil to contact the spark plugs coils and wires. In addition to spark plugs, coils, and wires, the valve cover gaskets must be replaced. This will increase the repair cost.

These are all vital reminders to consider before rambling on and on about the cost of replacing your spark plugs. It’s 100 percent worth it, in the end, to replace them, even if it means you need to take your car to a mechanic.

Frequently Asked Questions

How Much Does Spark Plug Replacement Cost

The cost of spark plug replacement depends on the number of spark plugs in your vehicle, how complex the process is, and what car it is. To replace your spark plugs, you will need to pay between $190-$260. This includes labor costs that range from $130 to $160 and parts and accessories, which can be priced between $60 and $90.

Do I Have To Get Rid Of A Car With Bad Spark Plugs?

Bad spark plugs are not enough to cause your car to be towed away. It is easy to pay for the replacement spark plugs and keep your car on the road in good condition.
If you think your car may have other problems with its engine, it might be worth considering selling it.

Is It Safe To Drive With Worn Spark Plugs?

Yes, it is safe, but spark plugs that have become too worn to cause engine misfiring can cause engine damage or overheating of catalytic converters. No matter the age or how many miles the plugs have, any engine that misfires or runs poorly should be checked for defects. Spark plug failure should not stop the engine from running. However, in extreme cases, the car may be unable to accelerate as fast as it used to. It is best to replace the plugs as soon as possible if the maintenance schedule states so.

How Often Should Spark Plugs Be Replaced?

Luckily, spark plugs don’t wear out very quickly. They can usually last for around 80,000 miles before needing to be replaced. If you have any of these symptoms, you should get your engine tuned up to check the spark plugs.

What Happens If Spark Plugs Aren’t Replaced?

As time goes on, spark plugs will wear out and cause engine problems. If the spark plugs fail to produce enough spark, the combustion of the fuel/air mixture becomes incomplete. This can lead to reduced engine power and, in the worst case, even the engine’s death.

Scott Greene is a seasoned automotive technician for over 5 years and has been deep into advanced automotive diagnostics for a couple of years. He Loves writing about Automotive Diagnostics and Repair, Trouble codes, Buyer guides for various car parts and accessories, and lots more. 

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