Ignition Coil Replacement Cost: Parts, Labor & Average Price

An ignition coil turns the battery's low voltage into the high voltage a spark plug needs to ignite fuel. Most modern engines have one coil per cylinder, so a four-cylinder engine has four and a V6 has six. When a coil weakens, the engine can misfire, idle roughly, lose power, or set a check engine light.

The final price depends on how many coils you replace, how hard they are to reach, and whether the shop finds a related problem. The figures below were checked on Oct 13, 2026 and come from Jerry, ThePricer, and other published guides.

A single coil on an easy-access engine is the cheapest version of this job. Replacing a full set costs more in total, even though the labor per coil drops when the shop is already working on the engine. Some shops recommend replacing the whole set when mileage is high or several coils show wear.

Vehicle design explains most of the spread. A small car with coils sitting on top of the valve cover is quick to service. An engine with coils buried under an intake manifold or a cover takes longer. The estimates below come from RepairPal and show how widely individual models differ.

Coils range from inexpensive aftermarket units to higher-priced original equipment parts. Quality varies, and original equipment coils tend to be more reliable. Some boots and connectors are sold separately, which can add to the parts total.

Labor depends on the shop's rate and on how much has to come off to reach the coils. Dealerships typically charge more per hour than independent shops.

A bad coil is sometimes a symptom. Oil leaking into the spark plug wells can damage coils, so a shop may recommend fixing a leaking valve cover gasket at the same time. Worn spark plugs can also overwork a coil, so many shops replace plugs when they replace coils. Ask the shop what it found and why each part is on the quote.

Sources describe the job in different ways. One figure covers a single coil on a typical car. Another averages across many models, so its range reflects both cheap and expensive designs. Regional labor rates and the choice of part brand add to the spread.

If only one cylinder is misfiring and the diagnosis confirms a bad coil, replacing that one costs the least. The other coils are the same age, though, and may fail later. A second failure means paying for access and labor again. For an engine where the coils are easy to reach, replacing one is usually fine. For an engine where the shop must remove many parts to reach them, replacing the full set at once can save money over time. Ask the shop which approach it recommends and why.

A misfiring engine can send unburned fuel into the exhaust, which can damage the catalytic converter, so repairing a misfire promptly is wise. A flashing check engine light usually signals a serious misfire. Have a technician look at the car soon rather than driving it for weeks.

On some engines the coils sit in plain view and come out with one bolt. On others they are hard to reach. Skilled owners can handle the easy ones, but a wrong diagnosis is a common mistake. Swapping coils between cylinders and checking whether the misfire moves is a standard way to confirm the culprit, and a shop can read the codes with a scan tool. If you are unsure, a technician will diagnose it faster.

• Number of coils. One coil costs less than a set.
• Engine layout. Coils that are hard to reach add labor.
• Part quality. Original equipment coils cost more than budget parts.
• Shop type. Dealers charge higher rates than independent shops.
• Related work. Spark plugs, boots, or a gasket repair may be added.
• Diagnosis. Some shops charge a diagnostic fee before the repair.