Updated at: 12-03-2022 - By: micdot

A vehicle’s twelve (12) volts will be converted into a lot more by the ignition coil, which will serve as an induction coil and turn it into enough voltage to jump the spark plug gap and ignite the air-fuel mixture in an engine, as required. How long are these ignition coils expected to last? Let’s take a look and find out. In other words, how long are ignition coils expected to last? On average, the life expectancy of an ignition coil in a car is roughly 100,000 miles. Your vehicle undergoes a combustion process. The combustion process will occur if you crank your vehicle, and it is necessary to get it started and moving. Many different parts of your car are required to get it moving. The ignition coils are a part of all of these different parts of your car. When you turn the key in your ignition, a spark is produced by the ignition coil, allowing the air/fuel mixture in your car’s engine to be ignited. That is why it is so important to maintain the quality of your ignition coil. Let’s go into the nitty-gritty of how long these ignition coils are good for. Let’s get this party started.

How Often Should Ignition Coils Be Replaced?

According to some estimates, your car’s ignition coil can last up to 100,000 kilometers. However, once you’ve driven 100,000 miles, you’re under no obligation to replace your ignition coils. Before then, you can swap out your ignition coils. When it comes to replacing your ignition coils, it’s not only the mileage that you need to keep in mind. The appearance of the ignition coils should also be examined. Check the performance of your vehicle as well. You can make an informed decision about when to replace your ignition coils based on a variety of criteria. It is possible to change and replace your ignition coils even before hitting the 100,000-mile milestone if they are in need of attention.

How Many Years Do Ignition Coils Last?

The ignition coil and the vehicle’s ignition module have a life expectancy of around two years, according to US Federal Law. At this point in time, the ignition coil will begin to wear down. In time, the ignition coil’s insulation will erode, causing it to malfunction. Because of this, the ignition coils will need to be replaced in two (2) years, and they should be done as soon as possible.

How Many Miles Do Ignition Coils Last?

Ignition coils can last up to 100,000 miles before needing replacement. When the ignition coils begin to deteriorate, you’ll already need to replace them at this point. A malfunctioning engine can result from failing to replace the ignition coils. If you don’t, your vehicle’s performance will be harmed, so you should fix it before then.

Should I Replace All Ignition Coils At Once?

No, you don’t need to swap out all of your car’s ignition coils. Instead, you’ll have to replace the one that’s broken.

What Are The Symptoms Of A Bad Ignition Coil?

There may be a problem with your ignition coils if you notice that your vehicle is not moving smoothly or acting strangely. To begin with, you’ll want to check the rest of your car’s components for damage. The ignition coils can now be checked if there are no other issues with your vehicle’s other components. Listed here are the indications that indicate a faulty ignition coil.

1. You Will Have A Misfire On Your Engine

If your ignition coils aren’t working properly, your engine will have misfires. Your car’s engine will make a coughing and sputtering noise when you try to start it with a failed ignition coil. It’s easy to see this when driving. There are a number of things that can cause your vehicle to jolt or make noise as you accelerate up.

2. You Will Have A Poor Fuel Economy

You also need to keep an eye out for low gas mileage. Ignition coils can cause poor fuel economy if they are not working properly. Take a look at how much fuel you’re putting in. If you notice a drop in your fuel economy, you may have faulty ignition coils.

3. You Might Experience A Rough Idle

If your engine has a rough idle, you should pay attention to it as well. You may think your engine is losing power. Idling your car can make you feel claustrophobic and as if you’re losing control of your vehicle. Check and repair your ignition coils if you notice these symptoms. Then, if necessary, replace it so that your issues can be resolved.

4. You Will Have A Stalling Of Your Vehicle

Your car may potentially stall if your ignition coil malfunctions. Your faulty ignition coils are causing your engine to stall because they are putting off erratic sparks into your spark plugs. If this is the case, you may have faulty ignition coils in your vehicle.

5. There Will Be Backfiring

Backfiring may be a sign of a problem with the ignition coil in your vehicle. Ignition coil problems might cause this symptom early on. In the event that you have gasoline in your combustion cylinders that is not being used, it will be expelled through the exhaust pipe. Don’t let this problem fester; if it does, you may be on the hook for a hefty repair bill.


To summarize, the ignition coil is a component of the start-up and operation of your vehicle. This is just as critical as a spark plug in your car. Keeping your ignition coil in good working order is also crucial.

Ignition coils must be replaced at some point because they will not last forever. However, they have a lifespan of around 100,000 kilometers.