Spark plug replacement cost
The average spark plug replacement costs $288 – $399 at a repair shop, before taxes and fees. Parts run about $104 – $129 and labor about $184 – $270.
Quick answer
$288 – $399parts and labor
Most drivers pay $288 – $399. On popular models the estimate ranges from $151 to $444, depending on the vehicle.
Average spark plug replacement cost
| Item | Typical cost |
|---|---|
| Parts | $104 – $129 |
| Labor | $184 – $270 |
| Total (national average) | $288 – $399 |
Before taxes and fees. Source: RepairPal national estimate, September 2026.
- Labor$184–$27066%
- Parts$104–$12934%
Share of a typical repair bill, using the middle of each range.
Cost by vehicle
| Vehicle | Estimated cost |
|---|---|
| Toyota Camry | $151 – $223 |
| Ford F-150 | $299 – $391 |
| Chevrolet Silverado 1500 | $325 – $444 |
RepairPal estimates for recent model years; your year, engine and trim can change the price.
What the job involves
Spark plugs ignite the fuel in each cylinder. Modern iridium and platinum plugs usually last about 60,000 to 100,000 miles. Four-cylinder engines with plugs on top are quick; on many V6 engines, the intake manifold has to come off to reach the rear plugs, which is why labor varies so much.
Warning signs
- Rough idle or engine misfire
- Hard starting
- Lower fuel economy
- Sluggish acceleration
- Check engine light with misfire codes
What changes the price
- Your vehicle. Parts for trucks, European and luxury models usually cost more, and on some engines the mechanic has to remove other parts first, which adds labor hours.
- Where you go. Dealers often charge 25% or more above independent shops. Most shops bill about $120 to $159 an hour (AAA, citing a 2025 PartsTech survey).
- The parts. OEM (factory) parts cost more than aftermarket or remanufactured parts. Ask which ones the estimate uses and what warranty comes with them.
- Extras. Related parts found during the job, fluids, shop supply fees and sales tax are not included in these averages.
How to pay less
- Follow the plug interval in your owner's manual; many modern engines go 100,000 miles.
- Replace a leaking valve cover gasket or failing ignition coil in the same visit to share labor.
How to get a fair estimate
- Ask for a written estimate that lists parts, labor hours and the shop’s hourly rate before any work starts.
- Ask whether the quote uses OEM, aftermarket or remanufactured parts, and what warranty comes with the parts and the labor.
- Get a second quote for any repair over a few hundred dollars. Independent shops often charge less per hour than dealers.
- Ask the shop to show you the old part or the reading that proves it failed, and to call you before doing extra work.
- Check for recalls and warranty coverage first: many powertrain, emissions and hybrid parts carry longer factory warranties.
Frequently asked questions
How much does spark plug replacement cost?
About $288 to $399 on average at a repair shop, including $104 to $129 for parts and $184 to $270 for labor, before taxes and fees.
How often should spark plugs be replaced?
Copper plugs about every 30,000 miles; long-life iridium or platinum plugs every 60,000 to 100,000 miles. Check your owner's manual.
Sources
Prices are national averages and typical ranges from published cost data. Your price depends on your vehicle, location, parts and shop, so get a written estimate. Car Repair Atlas is not a repair shop; read our disclaimer.