Typical replacement costs for a 2016 Honda Accord are roughly $150–$300 for the 2.4L four-cylinder and about $300–$600 for the 3.5L V6, including parts and labor. Prices vary by region, shop rate, and whether you use OEM or aftermarket plugs.
The 2016 Accord came with two engine options: a 2.4-liter four-cylinder and a 3.5-liter V6. Spark plug life is long but varies by driving conditions; the service interval is commonly around 100,000 miles. Replacing them is a routine maintenance item with costs influenced by the number of plugs, the type of plugs installed, and the labor required to access them.
Engine options and plug counts
Understanding the engine setup helps explain why costs differ. The 2016 Accord offers a 2.4L four-cylinder engine and a 3.5L V6. The four-cylinder uses four spark plugs, while the V6 uses six.
- The 2.4L four-cylinder (4 plugs) typically uses long-life iridium/platinum plugs, with a service interval near 100,000 miles.
- The 3.5L V6 (6 plugs) requires replacing six plugs, which increases both part and labor costs due to the larger job and longer access time.
In practice, the official interval for many Hondas with iridium plugs is around 100,000 miles, though you should verify the exact recommendation in your owner’s manual. Actual service can vary based on driving style and conditions.
Cost breakdown by engine and shop type
Below are common price ranges and what drives them, before you shop around for quotes.
- Parts cost per plug: Iridium/Platinum plugs typically run about $5–$15 each, depending on brand (NGK, Denso, OEM). Four-plug jobs use roughly $20–$60 in parts; six-plug jobs use roughly $30–$90 in parts.
- Labor rate and time: Independent shops often bill $75–$125 per hour. A 4-cylinder job usually takes about 0.8–1.5 hours; a V6 job can take 1.5–2.5 hours, depending on accessibility and coil removal steps.
- Total ranges by engine: Four-cylinder typically $150–$300 at independents and $200–$350 at dealers; V6 commonly $300–$600 at independents and $400–$700 at dealers.
- Other factors: Location, taxes, disposal fees, and whether coil packs are replaced or serviced can affect final pricing.
Prices reflect typical market rates and can vary widely by region, dealership versus independent shop, and the plug brand you choose. Always get a written quote before work begins.
Do-it-yourself vs professional service
If you're considering a DIY spark plug replacement, you can save on labor, but you need the right tools and confidence. The 4-cylinder job is generally easier and quicker than the V6 because there are fewer plugs and simpler access. Always consult the vehicle’s manual for torque specifications and gap settings, and use the correct plug type and heat range to avoid misfires or damage.
- Confirm engine type and the correct spark plug specification (brand, heat range, and gap).
- Gather tools: spark plug socket with extension, ratchet, torque wrench, anti-seize (optional per manual), dielectric grease, new plugs, gloves.
- Disconnect the battery and wait until the engine is cool to avoid injury or damage.
- Remove ignition coils and old plugs, inspect coils for wear, and install new plugs carefully with the proper torque specification.
- Reinstall coils, reconnect the battery, and start the engine to check for proper idle and absence of misfires.
DIY cost can be significantly lower than a shop, mainly saving on labor, but mistakes can lead to misfires or damage. If you’re unsure, a professional replacement is a safer choice.
Summary
For a 2016 Honda Accord, expect about $150–$300 for a 4-cylinder replacement and $300–$600 for a V6 when using a professional service, with variations based on location and plug choice. The number of plugs (4 vs 6), labor time, and shop type are the primary price drivers. If you’re comfortable with basic maintenance and have the right tools, a DIY replacement can cut costs, but always follow the owner's manual for torque and gap specifications. When in doubt, obtain multiple quotes from local shops to ensure you’re getting a fair price.