Ignition Coil Replacement Cost Calculator

• Quote under $95 for a single coil replacement: Below the scam floor. Ask for a parts breakdown. Budget coils with no warranty bring this in low, then fail within 90 days.
• Coil replacement recommended without a cylinder swap test: Any shop that condemns a coil without swapping it to a different cylinder and confirming the misfire follows the coil is guessing. That test takes five minutes.
• Full coil set on a vehicle under 60,000 miles: One coil failed early likely means a defect, not age. Replacing all coils on a low-mileage vehicle adds $200 to $700 unnecessarily. Get a second opinion.
• Shop supplies fee over $50 on a single-coil job: That line item on a simple coil replacement is padding.
• Ignition coil replacement bundled with a tune-up package: Upsell to decline. Coil replacement is not a tune-up item. The coil failed; the tune-up is a separate service with separate indicators.

Questions to ask before authorizing: (1) "What brand is the replacement coil and what warranty does it carry?" (2) "Did you perform a cylinder swap test to confirm this coil is the fault?" (3) "Is the diagnostic fee waived if I proceed with the repair?" (4) "Is this quote the same whether I pay cash or card?" (5) "What is your labor rate per hour?"

Ignition coil replacement is not covered by standard auto insurance unless the failure was caused by a collision or covered event. If your vehicle is under a manufacturer powertrain warranty (typically 5 years or 60,000 miles), coil failure may be covered.

Check with your dealer before paying out of pocket. An extended warranty or service contract may also cover the repair. Check your policy's covered components list before authorizing any payment.

No permit or regulatory requirement applies to ignition coil replacement. This is a standard mechanical repair, not an emissions-controlled modification.

For payment, most shops accept major credit cards. Some chains offer 90-day same-as-cash financing. If cost is a concern, ask the service advisor about deferred payment options before the work begins.

• Single coil replacement: $120 to $220 at an independent shop, parts and labor combined.
• Full set on a 4-cylinder: $310 to $540. V6: $440 to $760. V8: $540 to $960.
• Dealers charge $110 to $165 per hour (market estimate) vs. $79 to $125 per hour at an independent (market estimate). That difference adds $50 to $120 per coil job.
• OEM coils from Bosch or Denso cost $40 to $90 per unit. Economy aftermarket coils run $15 to $35 but fail earlier under heat.
• Any quote under $95 for a single coil replacement should prompt questions. See the scam floor below.
• If your vehicle has over 80,000 miles and one coil failed, replacing the full set costs less than two separate shop visits.

An ignition coil is a compact electrical transformer. It steps up your car's 12-volt battery current to 20,000 to 45,000 volts and fires the spark plug on demand. Most vehicles built after 2000 use coil-on-plug (COP) systems with one coil per cylinder.

Coils fail from heat cycling, vibration, and age. Symptoms include a rough idle, loss of power under load, a flashing check engine light, and a P0301 through P030X misfire code. The last digit names the cylinder. That code is the key: it tells you exactly which coil to test first.

A coil that reads within spec cold can still fail when hot. A mechanic who condemns a coil based only on a cold resistance test and not a fired cylinder swap is guessing. Say exactly this: "Can you swap the coil from the misfiring cylinder to a working cylinder and confirm the misfire code follows the coil, not the plug?" That swap takes five minutes and costs nothing.

That gap between an independent and a dealer on a single-coil job is $80 to $160, which means the independent is worth calling first unless your vehicle is under warranty. Dealer price IS fair when your vehicle is still under powertrain warranty and you need the repair logged against the OEM file.

Change the shop type input above to see how these rates shift your total.

Default: one coil, independent shop at $79 to $125 per hour (market estimate). Labor time: 0.5 to 1.5 hours.

Parts (aftermarket mid-grade coil): $60 to $100. Labor: $40 to $125. Total: $100 to $225. That overlaps the calculator's default range of $120 to $220. The spread reflects access difficulty by vehicle, not padding.

For a full 4-cylinder set: four coils at $60 to $100 each = $240 to $400 parts. Labor runs 1.5 to 2.5 hours = $120 to $315. Total: $360 to $715 at the extremes, with most quotes landing $310 to $540.

Billing rates sourced from BLS OES automotive technicians (national median wage $21.48/hr) with shop overhead applied. BLS-sourced, reliable within 10% nationally.

Parts markup is where independent shops recover margin. A Bosch or Denso OEM-equivalent coil retails for $40 to $90 per unit. The shop pays $25 to $60 wholesale and bills you retail. That markup is standard industry practice.

Economy aftermarket coils run $15 to $35 per unit but have shorter thermal lives, particularly on turbocharged engines that run hotter. If your shop quotes economy coils on a high-mileage European vehicle, ask for the brand name and look it up.

OEM coils from the vehicle manufacturer carry a one-year or 12,000-mile warranty in most cases. Check with your manufacturer. Aftermarket coils from Tier-1 suppliers like Delphi or Standard Motor Products carry comparable coverage. Budget coils often carry 90 days.

Quality varies considerably budget coils save $20 to $40 per unit but may not outlast the next inspection. Mid-grade aftermarket from a Tier-1 supplier is the best-value tier for most drivers. OEM is the premium option and usually unnecessary unless the vehicle manufacturer calls for it.

Domestic vehicles (Ford, GM, Chrysler) use widely available coils at $30 to $70 each. Japanese imports (Toyota, Honda, Nissan) use coils at $40 to $80. European imports (BMW, Audi, Mercedes) use coils at $60 to $120 and sometimes require dealer programming after replacement.

That European premium is real. A BMW inline-6 full coil set can reach $600 to $900 at an independent, which means the V6 range of $440 to $760 understates the high end for German vehicles. If you drive a European import, adjust the shop type to dealer and expect the upper band.

Labor rates vary by region. BEA Regional Price Parities show that California, New York, and Massachusetts run 10 to 20 percent above the national average for service labor. Mississippi, Arkansas, and Alabama run 10 to 15 percent below.

That regional gap on a $180 single-coil job translates to roughly $18 to $36 more or less depending on where you live. It is not negotiable. The state price table auto-generated below this section shows state-level adjustments derived from BEA data.

Booking in late fall or winter often means shorter wait times. Shops in northern states see fewer jobs in winter, which means more scheduling flexibility. The dollar difference is small, but faster service has its own value if the car is a daily driver.

Ignition coils are rated for 60,000 to 100,000 miles in most service manuals. In practice, COP coils on high-compression or turbocharged engines fail earlier. A coil that fails at 85,000 miles predicts that its neighbors were exposed to the same heat and vibration cycles.

The one-coil-or-all decision is specific to this job. If you replace only the misfiring coil on a vehicle past 80,000 miles, a second coil failure within six months costs $120 to $220 in repeat labor plus another parts markup.

Replacing the full set at one visit costs $80 to $150 more in parts but eliminates the second shop visit. That gap makes the full set the cheaper long-term choice on high-mileage vehicles.

This logic does NOT apply to spark plug replacement, where plugs wear more predictably and a misfire on a new set usually points to a coil, not a plug.

No maintenance schedule exists for ignition coils. They are not a service interval item. What you can do is replace spark plugs on schedule. Worn plugs demand higher voltage from the coil, accelerating coil wear. These two jobs are linked, ignoring plug replacement shortens coil life.

After an ignition coil replacement, clear the codes and drive through two full warm-up cycles before evaluating. A P0300 random misfire code that persists after coil and plug replacement often points to a fuel injector issue rather than another coil.

See the rough idle repair cost calculator for those diagnosis paths.

Ignition coil replacement is one of the more accessible DIY engine jobs. Most COP coils are accessible without removing the intake manifold. Access varies significantly by vehicle make and model.

Tools needed: 5mm or 7mm nut driver or socket, extension, torque wrench (10 Nm spec on most coils), dielectric grease. Parts cost: $30 to $90 per coil depending on brand. Total DIY cost for a single coil: $30 to $90 plus 30 to 60 minutes.

First-timer time estimate: 1 to 2 hours for a single coil on a straightforward 4-cylinder. Add 30 minutes if connectors are corroded or access is tight. Do not DIY if the engine has a coil pack buried under the intake manifold (common on transverse V6 engines).

That job requires intake removal and specialized tools.

Post-DIY: clear the codes with an OBD2 reader after replacement and drive two warm-up cycles to confirm the misfire is resolved. Do not assume a parts fix worked without verifying. Keep the receipt and old part for 90 days in case the new coil fails under warranty.