A full set of six spark plugs for a 2008 Impala typically costs about $12–$120, depending on the plug material and brand. Copper plugs are the cheapest, while platinum and iridium options and OEM replacements push the price higher. Labor is extra if you don’t install them yourself.
The 2008 Impala can come with different V6 engines (commonly a 3.5L or 3.9L), and the recommended spark plug type can vary by engine code. Always verify the exact part number for your specific trim and engine before buying, and consult your owner's manual or a parts lookup to ensure proper heat range and reach.
What determines spark plug pricing
Prices hinge on material, brand, and where you buy. Here’s a quick breakdown of typical costs you’ll see for a six-pack needed by the 2008 Impala.
- Copper core plugs — about $2–$4 each; roughly $12–$24 for a six-pack.
- Platinum plugs (single or double platinum) — about $5–$12 each; roughly $30–$72 for a six-pack.
- Iridium plugs — about $10–$20 each; roughly $60–$120 for a six-pack.
- OEM/Delco or premium aftermarket plugs — typically $6–$12 each; roughly $36–$72 for a six-pack.
Bottom line: your choice of material and brand drives the price, with higher-end options lasting longer and offering potentially better performance or fuel economy. DIY installation can significantly reduce overall costs by avoiding labor charges.
Where to buy and what to expect in total
Different retailers price spark plugs differently. Here’s a snapshot of typical ranges across common outlets as of now.
- Auto parts stores (AutoZone, Advance Auto Parts, O'Reilly) — plugs generally follow the material-based ranges above; a six-pack often runs $12–$72 depending on brand and type.
- Dealership/GM OEM replacements — expect about $5–$12 per plug; a six-pack commonly in the $30–$72 range, with potential higher prices for specialty plugs.
- Online retailers (Amazon, RockAuto, etc.) — price per plug commonly $2–$15; six-pack typically $12–$90 plus shipping.
- Performance or premium brands (Denso, NGK, Bosch) — usually $6–$20 per plug; six-pack $36–$120.
Before purchasing, confirm your exact engine model and the recommended plug type and gap. If you’re not confident about installation, factor in labor costs at a shop, which can range from $60 to $150 per hour depending on location.
Summary
For a 2008 Impala, you’ll need six spark plugs. Parts cost typically ranges from about $12 to $120 depending on material and brand, with copper being cheapest and iridium or OEM platinum on the higher end. Labor, retailer choices, and warranty considerations will affect the total. Ensure you buy the correct plug type for your specific engine and follow the manufacturer’s torque specifications for a proper seal and performance.