For a typical four-cylinder Honda Accord, spark plug replacement costs about $150 to $300 at a shop. Doing it yourself can cut parts costs to roughly $20 to $70, depending on plug type.
The Accord's common four-cylinder engines use four spark plugs, and many models use long-life iridium or platinum plugs with higher price but longer service intervals. Labor times vary by engine layout and accessibility, generally ranging from about 0.8 to 1.5 hours at typical shop rates. Prices also depend on location and whether you choose a dealership or an independent mechanic.
What affects the price
Several factors influence the final bill when you replace spark plugs on a Honda Accord:
- Engine and plug type: Four-cylinder engines with four plugs vs any six-cylinder configurations.
- Plug technology: Copper/platinum vs iridium; OEM long-life plugs cost more but last longer.
- Labor rates: Geography and shop type (dealership vs independent).
- Accessibility: Some engine designs require more labor to reach the plugs.
- Additional parts: Coils, coil boots or ignition coils may be replaced if worn or damaged.
In short, price tends to rise with richer plug technology and when access to the plugs is difficult.
Cost estimates by engine configuration
Here are typical ranges for common Honda Accord configurations that appear on U.S. roads in recent model years. Actual quotes will vary by location and shop.
- Inline-4 engine (1.5L turbo or 2.0L turbo) with four plugs: Typically $150–$300 total, including parts and labor.
- V6 engine (3.5L) with six plugs: Typically $250–$500 total.
These ranges assume standard replacement plugs and standard labor rates. Premium or OEM plugs and dealer pricing can push the total higher, and if ignition coils or other components need replacement, expect additional costs.
Do-it-yourself spark plug replacement
If you have basic automotive repair experience, DIY can minimize costs by eliminating labor charges. Here’s what to expect.
- Parts cost: Four spark plugs typically $8–$60 depending on brand and whether you use aftermarket or OEM. Iridium or platinum plugs at the higher end.
- Tools you may need: Spark plug socket, ratchet and extension, torque wrench, anti-seize compound and dielectric grease, and a short service manual for torque specs.
- Estimated time: 1–2 hours for a routine four-plug job on a typical Accord.
- Risks: Stripped threads, mis-torqued plugs, or damaging coil packs if not careful.
If you are not comfortable with engine maintenance, a professional service remains the safer option.
Where to get a quote
To ensure you get a fair price, compare quotes from multiple shops and ask for an all-in price that includes both parts and labor. When you call, verify:
- Plug type and number of plugs required (four for most four-cylinder Accords, six for some V6 models).
- Whether the quote covers ignition coils or coil boots if replacement is needed.
- Any additional shop fees, taxes, or environmental fees.
- Warranty on parts and labor and what is covered under the warranty.
Also consider asking for a projected timeline and whether the shop will perform a quick diagnostic to ensure no other issues are present.
Summary
For most Honda Accord four-cylinder models, expect a shop price in the $150–$300 range to replace spark plugs, with higher totals for V6 engines or dealer service. DIY parts-only costs can be as low as $20–$70, depending on plug type. Always verify the plug type, replacement interval, and labor rates in your area, and compare several quotes to get the best value. Regular spark plug replacement helps maintain engine efficiency and reliability.