Repair cost · Engine
Ignition Coil Replacement Cost
Average cost: A ignition coil replacement costs between $238 and $320 on average, according to RepairPal's national estimate. Labor accounts for $74 to $109 and parts for $164 – $211. The figures exclude taxes and fees, and your price depends on your vehicle and where you live.
| National average, parts and labor | $238–$320 |
|---|---|
| Sources checked | 1 |
RepairPal puts the national average for a ignition coil replacement at $238 to $320, before taxes and fees. Based on the midpoints of RepairPal's ranges, labor makes up about 33% of the bill and parts about 67%. Your quote can be higher or lower depending on the make, model and engine of your car, the parts used and local labor rates.
Cost breakdown
| RepairPal national average | |
|---|---|
| Total | $238 – $320 |
| Labor | $74 – $109 |
| Parts | $164 – $211 |
Source: RepairPal estimate, last updated September 3, 2026. Excludes taxes and fees and does not adjust for location.
What an ignition coil does
An ignition coil turns the battery's low voltage into the very high voltage needed to make a spark at the spark plug. Most modern engines have one coil per cylinder, mounted directly on top of each plug. When a coil weakens or fails, that cylinder misfires.
Signs of a failing coil
- A check engine light, often flashing, with a misfire code for one cylinder.
- Rough idle, shaking or a loss of power.
- Hesitation when accelerating.
- Lower fuel economy.
A misfire does not always mean the coil is bad. Worn spark plugs, a vacuum leak, an injector problem or low compression can produce the same symptoms. A common test is to swap the suspect coil with one from another cylinder: if the misfire moves, the coil is at fault.
Why the cost varies
On many engines the coils are easy to reach and the job is quick, so parts make up most of the bill. On some V-shaped engines, the rear coils sit under the intake manifold, which adds labor. Prices also vary between original-equipment coils and aftermarket ones.
Replace one coil or all of them?
If one coil has failed and the others are original and old, some owners replace them all to avoid repeated visits. Others replace only the failed coil to save money. Both approaches are reasonable. If the plugs are also due, replacing plugs at the same time makes sense because a worn plug puts extra strain on the coil.
Don't drive with a flashing check engine light
A flashing check engine light usually signals a severe misfire. Unburned fuel can reach the catalytic converter and overheat it, and a damaged converter costs far more than a coil. Reduce driving and get the misfire diagnosed promptly.
Can you do it yourself?
On engines where the coils sit on top, replacing a coil is usually a simple job: disconnect the electrical connector, remove a bolt and pull the coil out. The harder part is the diagnosis. If you are not sure which coil is bad, a scan tool or a shop diagnosis saves money.
Questions to ask the shop
- How did you confirm the coil is bad rather than the plug or injector?
- Are you installing original-equipment or aftermarket coils?
- Are the spark plugs due as well?
How the job is done
- The shop reads the trouble codes and identifies which cylinder is misfiring.
- The coil may be swapped with another cylinder to see whether the misfire follows it.
- Engine covers are removed, the coil's electrical connector is unplugged, and the hold-down bolt is removed.
- The old coil is pulled out and the spark plug well is checked for oil or moisture.
- The new coil is installed, the connector is plugged in, and codes are cleared.
- The engine is test driven to confirm the misfire is gone.
Frequently asked questions
Can I drive with a bad ignition coil? Short distances are possible, but misfires waste fuel and can damage the catalytic converter. A flashing check engine light means you should stop driving soon.
What causes ignition coils to fail? Heat, age, worn spark plugs that require more voltage, and oil leaking into the spark plug wells are common causes.
Should the spark plug be replaced with the coil? If the plugs are near their replacement interval, yes. A worn plug can make a new coil fail sooner.
Are aftermarket coils reliable? Quality varies. Original-equipment or reputable brands are usually the safer choice.
Is your quote fair?
Compare your written quote with the national range above. A quote well above $320 is not automatically wrong, because some vehicles need more parts or more hours, but it is worth asking the shop to explain the difference. Ask for the quote to be split into parts and labor, and for the parts to be listed by name and brand. If the labor portion is far above $109, ask how many hours the shop is charging and what makes your car take longer. Getting a second written quote for the same parts is the simplest way to check a price.
What happens if you wait
A failing ignition coil causes misfires: rough idle, hesitation when accelerating, poor fuel economy and a check engine light. If the light is flashing, the misfire is severe enough to damage the catalytic converter, because unburned fuel enters the exhaust and burns inside it. A converter is far more expensive than a coil, so a flashing light means reducing driving and getting the car checked soon.
One coil or all of them?
On engines with one coil per cylinder, it is common to replace only the failed coil. Some owners replace all coils at once on high-mileage engines, especially if more than one has already failed, to avoid repeated visits. Ask the shop for its recommendation based on mileage and the condition of the others. If spark plugs are due, replacing them at the same visit saves labor.
After the repair
The check engine light should stay off after the codes are cleared and the car has been driven. If the misfire returns on a different cylinder, mention it to the shop; it may point to other issues, such as a worn plug, oil in the plug well, or a fuel injector problem.
Coil-on-plug vs. coil packs
Older engines use one coil pack for several cylinders, which costs more per part but is replaced less often.