Average Cost
$150 to $600+
Typical total depends on cylinder count, plug accessibility, labor rate, and whether related ignition parts are serviced at the same time.
TorqueMech Cost Guide
Spark Plug Replacement Cost
Spark plug replacement cost usually depends on engine layout, plug access, and whether ignition coils, intake components, or related tune-up items add labor to the job. This page gives a clear baseline before you move into the estimator.
Labor Time
1.0 to 4.0 hours
Straightforward four-cylinder jobs are usually quicker, while transverse V6 engines or buried rear-bank plugs can add significant labor.
Parts Cost
$20 to $250+
Price varies based on plug type, cylinder count, brand, and whether coils or boots are also replaced during the repair.
Common Symptoms
- Engine misfire or rough idle
- Hesitation or reduced power under load
- Poor fuel economy
- Hard starting or longer crank time
- Check engine light with misfire-related fault codes
What Affects Cost
- Engine layout and plug access
- Four-cylinder versus V6 or V8 labor time
- Standard, platinum, or iridium plug choice
- Whether intake components or coil packs need removal
- Condition of the threads, boots, and related ignition hardware
Estimate This Repair
Use TorqueMech to build a spark plug replacement estimate with your labor rate, selected service, and vehicle context.