📈 Average 2026 US Cost
$100 - $400
Per coil. Full set of 4: $300-$800. Set of 6 or 8: $500-$1,200.
📈 What Affects The Price
- COP (coil-on-plug) vs coil pack: COP: one coil per cylinder, easy to replace one. Coil pack: shared coil, often replaced as a unit.
- OEM vs aftermarket: OEM lasts longer. Cheap coils often fail within a year.
- Number of cylinders: 4 coils for inline-4, 6 for V6, 8 for V8.
- V6 rear bank access: Some V6s require intake manifold removal - adds 1-2 hours.
- Replace one or all: On 100k+ mile cars, replacing all is smart - others are likely tired.
- Spark plugs at same time: Plugs are right there - replace if overdue. Adds $40-$200 in parts.
💵 Cost Breakdown: Parts vs Labor
🛠️ Parts
$50 - $300
Aftermarket: $25-$60 per coil. OEM Denso, NGK, Bosch, Delphi: $50-$200 per coil.
👨🔧 Labor
$50 - $150
Most coils are a 15-30 minute job. Some V6 rear banks need intake removal.
🚗 Cost By Vehicle Class
| Vehicle Class | Typical Range | Notes |
|---|
| Compact 4-cyl | $80 - $250 | Easy DIY |
| Sedan V6 | $120 - $350 | Front bank easy |
| V6 SUV (rear bank) | $200 - $500 | Intake removal possible |
| Truck V8 | $150 - $400 | 8 coils, easy access |
| Luxury / European | $200 - $600 | OEM Bosch only |
⚖️ DIY vs Shop
🔧 DIY
- +Saves $50-$150 in labor
- +One bolt and a connector on most cars
- +Usually under 30 minutes per coil
- -Cheap coils fail fast
- -Wrong coil = misfire
🏭 Shop
- +Tests coils with scan tool first
- +Avoids replacing healthy coils
- +Warranty
- -Easy upsell to "all coils" without testing
🔒 How To Avoid Overpaying
- Pull codes first - P0351-P0356 each correspond to a specific cylinder.
- Swap a known-good coil to the bad cylinder to confirm before replacing.
- Replace the spark plug at the same cylinder - often part of the misfire cause.
- Stick with OEM Denso, Bosch, NGK, or Delphi. Cheap coils often fail in 6-12 months.
- On cars with 100k+ miles, replacing all coils preventively is reasonable.
- Avoid coil packs from unknown brands - reliability is poor.
- If a new coil fails fast, suspect an injector or plug issue on that cylinder.
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💬 Frequently Asked Questions
How do I know which ignition coil is bad?
Codes P0351-P0356 each point to a specific cylinder. P0351 = cylinder 1, P0352 = cylinder 2, etc.
Should I replace all coils at once?
On cars under 80,000 miles, replace only the bad one. On cars over 100,000 miles, replacing all is reasonable preventive maintenance.
Can I drive with a bad ignition coil?
Briefly. A misfire can damage the catalytic converter ($1,000+ repair) over time. Fix it within a few weeks - a few days if the check engine light is flashing.
Are aftermarket coils as good as OEM?
Quality brands (Denso, Bosch, NGK, Delphi) are fine. Cheap no-name coils often fail in 6-12 months.
Will new coils improve performance?
On a misfiring engine, yes - smoother idle, better acceleration, better mileage. On a healthy engine, no improvement.