Spark Plug Replacement Cost
Spark plug replacement is routine maintenance every 60k–100k miles. Cost depends mostly on how buried the plugs are — transverse V6s and turbo engines take the longest.
Fair total cost
$85–$545
Parts
$30–$120
Labor time
0.5–2.5 hrs
Shop rate
$110–$170/hr
Common symptoms
- Misfire or check-engine light
- Rough idle
- Reduced fuel economy
What a fair quote includes
- OEM-spec iridium or platinum plugs
- Dielectric grease on boots
- Torque-to-spec installation
Red flags to watch for
- Coil packs replaced without a misfire on that cylinder
- Generic copper plugs in an engine that calls for iridium
- Labor over 3 hours on a typical inline-4
FAQs
Should I replace ignition coils at the same time?
Only if a coil tests bad or has a stored misfire code. Coils don't have a fixed service interval.
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