What are the best spark plugs for a 2017 Honda Civic?

For a 2017 Honda Civic, iridium spark plugs from reputable brands—such as Honda OEM, NGK Iridium IX, or Denso Iridium Power—are generally the best choice for longevity and smooth performance. Copper or platinum plugs can work, but iridium plugs are typically preferred in modern Civics for better burn efficiency and longer service intervals.

The Civic lineup in 2017 included two main engine configurations: a 2.0-liter naturally aspirated i-VTEC and a 1.5-liter turbocharged engine. Each has different spark plug requirements and intervals. This guide covers the best options for both setups and explains how to identify the right part numbers and gaps for your car.

Engine options and plug recommendations

2.0L i-VTEC (K20C2) Naturally Aspirated

These vehicles typically benefit from iridium plugs that maintain reliable ignition and efficiency over time. Stick with reputable brands and ensure the replacement matches the engine’s gap and torque specs.

Before listing the top picks, keep in mind that you should choose iridium plugs from trusted brands and verify the gap is correct for your specific Civic model.



• Honda OEM Iridium Spark Plugs (Iridium, designed for Honda engines) — the closest match to factory specifications and most seamless in terms of fit and performance.


• NGK Iridium IX Spark Plugs — widely used aftermarket option with strong reliability and good heat range for the 2.0L engine.


• Denso Iridium Power Spark Plugs — another popular aftermarket choice, known for improved longevity and consistent performance.

In summary, for the 2.0L Civic, iridium plugs from Honda, NGK, or Denso are the recommended starting points, offering durability and dependable ignition under typical driving conditions.

1.5L Turbo Engine (L15B7/L15B family)

The 1.5L turbo models in the 2017 Civic benefit from high-quality iridium plugs as well, with emphasis on heat tolerance and reliable combustion under boost. Aftermarket iridium options from NGK or Denso are common upgrades, while keeping OEM-grade plugs as a solid baseline.

As with the 2.0L engine, ensure you select an iridium type and verify the correct pre-set gap for your turbocharged setup. The turbo engine tends to respond well to plugs designed for higher heat and boost management.



• NGK Iridium IX Spark Plugs — a dependable choice that works well with the 1.5L turbo and maintains performance and longevity.


• Denso Iridium Power Spark Plugs — frequently chosen for turbo apps due to durable construction and reliable ignition under boost.


• Honda OEM Iridium Spark Plugs — using factory-equivalent iridium plugs helps preserve OEM performance and drivability.

Bottom line: for the 1.5L turbo, iridium plugs from Honda, NGK, or Denso are solid, widely compatible options that balance performance with longevity in boosted operation.

How to choose the right spark plug

Before picking a plug, consider the engine type, driving style, and maintenance expectations. The following guidelines help you select the best option for your 2017 Civic:

Use this list to compare plug types and match them to your engine and driving needs.



• Iridium vs platinum vs copper: Iridium is the standard choice for modern Civics due to longevity and stable performance; platinum is acceptable but generally offers shorter service life; copper is cheaper but requires more frequent changes and may not be ideal for turbo engines.


• Heat range and gap: Choose a plug with a heat range suitable for your engine and climate, and ensure the gap is correct for your specific model. Many Civics ship with a factory gap that is best maintained by a proper pre-gap or re-gap procedure.


• OEM vs aftermarket: OEM iridium plugs provide the most seamless fit and calibrated performance; reputable aftermarket brands (NGK, Denso) offer strong alternatives with broad availability.


• Maintenance interval: Iridium plugs often offer longer intervals (often up to 60,000–100,000 miles in many setups) compared to copper or platinum plugs. Always follow the owner’s manual guidance for replacement intervals.

In short: for the 2017 Civic, choose iridium plugs from Honda, NGK, or Denso, verify the correct gap, and follow the maintenance schedule to optimize ignition performance and fuel efficiency.

Installation and maintenance tips

Proper installation ensures you get the full benefits of your new spark plugs. Here are practical tips to install and maintain them correctly:

Use a torque wrench and the manufacturer’s specified torque to avoid under- or over-tightening, which can damage the threads or plug seat.



• Do not apply anti-seize compounds on spark plugs unless the manual explicitly requires it; most modern engines assume dry threads for proper torque.


• Inspect the ignition coil boots for wear or cracking and replace if necessary to ensure a good seal and proper spark delivery.


• Replace plugs in a systematic order and torque to spec, then re-check ignition system performance after installation.

Following these steps helps maximize plug life and maintain smooth engine operation in both the 2.0L and 1.5L turbo Civic configurations.

Summary

For a 2017 Honda Civic, iridium spark plugs from Honda OEM, NGK Iridium IX, or Denso Iridium Power are the best starting points for both the 2.0L and 1.5L turbo variants. Prioritize iridium over copper or platinum for longevity and consistent combustion, confirm the correct gap for your specific model, and follow the vehicle’s maintenance schedule. When in doubt, consult your owner’s manual or a trusted technician to verify the exact part numbers and gap specs for your car’s engine type and revision.