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What is the average lifespan of an ignition coil?

The average lifespan of an ignition coil is typically between 60,000 to 100,000 miles, or approximately 5 to 10 years of normal use. Ignition coils are an essential component of a vehicle's ignition system, responsible for providing the high-voltage spark that ignites the air-fuel mixture in the engine's cylinders.


Understanding Ignition Coils and Their Lifespan


Ignition coils are designed to withstand the high-voltage and high-temperature environment of an engine, but they are not immune to wear and tear over time. Several factors can influence the lifespan of an ignition coil, including driving conditions, engine performance, and maintenance habits.



  • Driving Conditions: Vehicles that are driven in harsh environments, such as off-road or in extreme temperatures, may experience more wear and tear on their ignition coils, leading to a shorter lifespan.

  • Engine Performance: High-performance engines that operate at higher RPMs and generate more heat can put additional stress on the ignition coils, reducing their lifespan.

  • Maintenance Habits: Regular maintenance, such as replacing spark plugs and keeping the ignition system in good condition, can help extend the lifespan of the ignition coils.


It's important to note that the average lifespan of an ignition coil is a general guideline, and individual coils may last longer or shorter depending on the specific conditions they are subjected to.


Symptoms of a Failing Ignition Coil


When an ignition coil begins to fail, it can exhibit several symptoms that may indicate the need for replacement. These include:



  • Misfiring Engine: A failing ignition coil may cause the engine to misfire, resulting in a rough idle, hesitation, or loss of power.

  • Check Engine Light: The vehicle's onboard diagnostic system may detect a problem with the ignition coil and illuminate the check engine light.

  • Reduced Fuel Efficiency: A malfunctioning ignition coil can lead to incomplete combustion, resulting in decreased fuel efficiency.

  • Difficulty Starting: In some cases, a failing ignition coil may make it difficult to start the engine, especially in cold weather.


If you notice any of these symptoms, it's important to have your vehicle's ignition system inspected by a qualified mechanic to determine the root cause and address the issue before it leads to more extensive damage.

Should you replace all 4 coils at once?


Many manufacturers suggest replacing all coils simultaneously, especially if the vehicle has high mileage or if a coil failure has occurred. This approach can ensure optimal performance and prevent future misfires, as the remaining coils may soon fail if they're of similar age.



What kills an ignition coil?


Contact failures are generally caused by water intrusion in spark plug recesses and voltage supply problems by a weak or failing battery, or faulty wiring.



Are ignition coils worth replacing?


Ignition coils are vital to your car's performance, fuel efficiency, and longevity, so neglecting them can lead to larger issues down the road. They're not that expensive - so replacing them preventatively is definitely worth it.



How do I know if my coil needs replacing?


5 signs that show it's time to change your vape coil

  1. Your Vape Tastes Burnt. This is probably the most noticeable thing that tells you your coil needs replacing, and something most vapers will experience.
  2. Your E-Cigarette Is Gurgling.
  3. Your Vape Tastes 'Strange'
  4. Your Coil Is Used Up.
  5. E-Cigarette Leaks.



How do I know when my ignition coil needs replacing?


  • Engine Misfires : A common symptom is engine misfiring, which can cause rough idling and decreased performance.
  • Poor Fuel Economy : A failing ignition coil can lead to incomplete combustion, resulting in increased fuel consumption.
  • Difficulty Starting the Engine
  • Check Engine Light
  • Rough Idle
  • Loss of Power
  • Backfiring



How many years does an ignition coil last?


Ignition coils can last anywhere between 120,000 to 150,000 miles or five to seven years, but this can still change depending on several factors, such as your driving habits and your vehicle's year, make, and model.



What is the most common cause of ignition coil failure?


The overheating of ignition coils can hinder their ability to conduct electricity. Wear and tear is a common reason for ignition coils failing. It causes degrading of the insulation between the primary and secondary coil windings and the primary coil. The reduction in insulation can cause the coil to overheat.



Do ignition coils go bad suddenly?


Ignition coils can fail prematurely due to excessive heat, vibration, moisture, worn spark plugs, or electrical issues.



How much does it cost to replace an ignition coil?


Parts can range from about $35 to more than $300 for one ignition coil, according to the vehicle you drive. Labor costs for replacing the part are usually less than $100. Is it worth replacing ignition coil? Your car won't run properly if you have a faulty ignition coil.



How often should you replace ignition coils?


Ignition coils typically do not have a specific replacement interval, but they can last anywhere from 60000 to 100000 miles (approximately 96000 to 160000 kilometers) under normal driving conditions. However, factors such as engine type, driving habits, and maintenance practices can affect their lifespan.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.