For a 2017 Honda Accord, the best choice is iridium long-life spark plugs from NGK or Denso that match your engine variant (1.5L turbo or 2.0L turbo) and are installed with the correct gap. OEM-equivalent plugs from these brands are widely regarded as the safest, most reliable option for sustained performance.
Engine variants and what they mean for plugs
In 2017 the Accord offered two turbocharged engines: a 1.5-liter turbo and a 2.0-liter turbo. Each uses a similar approach to spark plug design (long-life iridium/platinum), but you should verify the exact heat range and reach for your specific engine code. Using the correct heat range and gap helps prevent misfires, pre-ignition, and fouling in the turbocharged setup.
Why the right plug matters
The turbocharged engines in the 2017 Accord run hotter and demand reliable ignition under load. Iridium or platinum long-life plugs maintain electrode integrity longer than copper options, which translates to better fuel efficiency, smoother idle, and fewer misfires over time. Always cross-check with your owner's manual or a parts lookup by VIN to confirm the exact specification for your car.
Best spark plug options for the 2017 Accord
Below are plug types commonly recommended by Honda owners and independent technicians for this model. They balance reliability, performance, and longevity across both turbo engines when matched to the correct heat range and gap.
- OEM-equivalent iridium spark plugs from NGK (Iridium long-life family)
- OEM-equivalent iridium spark plugs from Denso (Iridium Power or equivalent)
- Performance-oriented iridium plugs from NGK or Denso that explicitly support turbocharged Honda engines
Concluding note: In practical terms, most drivers will get the best results by choosing a genuine OEM-equivalent iridium plug from NGK or Denso, ensuring the correct heat range and gap for their exact engine code. Purchase from a reputable retailer and follow the installation torque specs from Honda’s service documentation.
How to choose the right gap and install
Before you install, verify the gap specification and ensure you use the proper torque and cleanliness standards. The following guidance helps you pick and set the plug correctly.
- Always reference the vehicle’s service manual or the official parts catalog for the exact gap specification for your engine code (1.5L turbo or 2.0L turbo).
- For most modern turbo Hondas, a common aftermarket gap range is around 0.028–0.032 inches, but use the exact specification from your manual or packaging.
- Inspect and replace old ignition components as needed; use a torque wrench to tighten plugs to the recommended specification and avoid overtightening.
In short, match the plug type to the engine code, set the precise gap, and follow Honda’s installation torque guidelines to ensure optimal performance and longevity.
Maintenance intervals and tips
Replacement intervals vary by plug type and driving conditions. Iridium or platinum long-life plugs typically offer longer service life than copper, but always verify with Honda’s guidelines and your driving habits.
- Iridium/Platinum long-life plugs: commonly around 100,000 miles under normal driving, but check the official spec for your engine code.
- Copper-core or older-style plugs: often shorter intervals (roughly 30,000–60,000 miles), and may be less suited for turbocharged operation.
- If you notice rough idle, misfires, reduced fuel efficiency, or sluggish acceleration, inspect and replace plugs as needed rather than delaying beyond recommended intervals.
Always follow Honda’s official recommendations and consider professional installation if you’re unsure about heat range, gap, or torque specifications for your specific engine code.
Summary
The best spark plugs for a 2017 Honda Accord are iridium long-life plugs from NGK or Denso, chosen to match your exact engine (1.5L turbo or 2.0L turbo). Prioritize OEM-equivalent iridium plugs with the correct heat range and gap, and follow the manufacturer’s installation guidelines. Regular maintenance and correct installation will maximize performance, efficiency, and reliability across the life of the vehicle.
Final note
If you want a precise plug part number, provide your exact engine code (L15B7 for 1.5L turbo or K20C1 for 2.0L turbo) and your VIN, and I’ll look up the recommended NGK and Denso options and the exact gap and torque specs for your car.
Summary of recommended approach
• Use iridium long-life plugs from NGK or Denso that are OEM-equivalent for your 2017 Accord. • Confirm the exact heat range and gap from Honda’s manual or a trusted parts catalog. • Follow proper installation practices and refer to official torque specs. • Monitor engine performance and replace at the manufacturer-recommended interval or sooner if symptoms appear.