Spark Plug Replacement Cost

What are the symptoms of bad spark plugs and can you expect to pay for a spark plug replacement cost? Here's a super simple guide to give you an overview.

Spark plugs and other components of the engine are like other relationships – without a spark, it will not work.

Bad spark plugs may present differently, some symptoms include rough idle, misfires, and a shaky ride.

Luckily, changing the spark plugs is not an expensive nor difficult fix.

As with all automotive parts, several factors determine the price of a repair.

The spark plug change cost is not an exception. You can expect to pay anywhere from $5 to $60 for parts while the labor cost differs greatly depending on where you take your car for a replacement.

However, in most cases, the price is at the bottom of the spectrum. We will go through all the factors so you can get a better estimate of how much you will have to spend.

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Symptoms Of Bad Spark Plugs

fouled up spark plugs

Before you decide to replace the spark plugs of your car, you should consider if they are the culprit of the symptoms occurring.

Symptoms and signs of bad spark plugs include misfiring, rough idle, high fuel consumption, and rough acceleration where vibrations may occur.

While these symptoms may point to bad spark plugs, many other things may be the cause of these problems.

The first thing you should keep in mind is the last time you changed the spark plugs. Spark plugs usually last more than 50 000 miles and even double that depending on the type.

This means that unless you have (incorrectly) installed new spark plugs recently, or you replaced them a long time ago, the problem may lie somewhere else.

At the same time, spark plugs are relatively cheap which makes many mechanics tempted to change the spark plugs first if the problem is not clear.

Many times, other parts are the cause of the abovementioned problems, many times the ignition coil is the culprit, not the spark plugs.  

If it has been a long time since the spark plugs were replaced and the engine start misfiring or running rough, chances are high that it is due for new spark plugs.

Price Of Sparkplugs

two spark plugs

If you or your mechanic have established that the spark plugs are the culprit, the first thing that may come up to your mind is “How much are spark plugs?”.

There are different types of spark plugs, some that may cost over $40, but luckily most cars use cheaper spark plugs around $5 to $10.

You may sometimes opt for a more expensive option, mainly spark plugs with platinum or iridium tips.

Platinum and iridium tips will offer greater longevity compared to copper spark plugs.

The best way is to use whatever is stated by the manufacturer of your car, but keep in mind the longevity depending on the type of spark plug that is used.

Total Cost

car spark plugs

The total cost can differ depending on the cause of the problem.

For example, if it turns out that a spark plug has prematurely gone bad, it is sufficient to change that single spark plug.

On the other hand, if one spark plug got bad close to its expected lifetime, it is better to replace all the sparkplugs which will contribute to the total cost.

Changing the spark plugs is not very complicated and can be done by almost anyone. If you do decide to do it yourself, make sure to take all the precautionary safety measures.

If you decide to leave it to a professional the labor cost will vary depending on several factors, in short, you can expect to pay $50 to $130.

As previously mentioned, different types of spark plugs differ in longevity and price.  

A pack of 4 copper spark plugs will on average cost $8 – $12 while a pack of 4 iridium spark plugs costs between $35 and $50. Platinum spark plugs cost somewhere in between.

Keep in mind that not all cars use four spark plugs, some cars use three, six, eight, or even ten spark plugs, depending on how many cylinders the engines have.

Conclusion

auto spark plugs

Changing spark plugs is not very complicated nor is it expensive.

The symptoms of bad spark plugs include misfires, bad gas mileage, and rough idle. These symptoms are not specific to spark plugs but are very common when the spark plugs go bad.

Different types of spark plugs differ in price, but also the longevity. You should choose the type of spark plugs that your car manufacturer recommends.

Changing spark plugs can be done as a small DIY project, which may save you $50 to $130 in labor cost.

If one of the spark plugs goes bad prematurely for whatever reason, you may replace only the one that has gone bad.

If the spark plug has gone while it is close to its life expectancy, you are better off changing all the spark plugs.

The total cost of a spark plug replacement will cost you between $60 to $180 for a four-cylinder car. In most cases, the price will be somewhere in-between.

Keep in mind that you can save a lot by changing the spark plugs yourself, however, make sure to take all safety measures.

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Bajro is a big car enthusiast with a love for writing and teaching. He writes about anything regarding cars - from common problems and fixes to racing.