Short answer: the 2016 Honda Accord uses iridium-tipped, long-life spark plugs. The exact type depends on the engine (2.4-liter four-cylinder or 3.5-liter V6), so you should verify the precise specification in the owner’s manual or with a Honda dealer.
Engine options and plug types
The 2016 Accord was offered with two engines. In both cases, Honda specifies iridium-tipped, long-life spark plugs designed for reliable ignition and extended service intervals. Exact heat range and OEM part numbers vary by engine and market, so confirm the precise specification before purchasing replacements.
- 2.4 L inline-4 engine: Iridium-tipped, long-life spark plugs are recommended; gap is typically around 0.043–0.046 inches, but verify the exact spec in your manual.
- 3.5 L V6 engine: Iridium-tipped, long-life spark plugs are recommended; gap should be verified in the manual or a service bulletin for your specific market.
In general, use OEM-equivalent plugs from reputable brands (such as NGK or Denso) that match Honda’s ignition system requirements for your engine.
Replacement guidance and maintenance
Before the upcoming list, note that replacement timing and exact parts depend on your engine and driving conditions. The following guidelines help ensure you use the correct plugs and install them properly.
- Check the owner's manual or a dealership for the exact part number and gap specification for your engine and market. Typical replacement intervals for iridium long-life plugs are around 105,000–120,000 miles under normal driving, though severe conditions can shorten this interval.
- When replacing, install plugs to the manufacturer’s torque specification and set the gap accurately with a gap tool before installation. Many modern plugs do not require anti-seize; follow the manual’s guidance.
Adhering to OEM specifications helps maintain performance, fuel efficiency, and emissions compliance.
Summary
The 2016 Honda Accord uses iridium-tipped, long-life spark plugs, with the exact type and gap varying by engine (2.4L or 3.5L). Verify the precise specification in the owner’s manual or with a dealer, use OEM-equivalent plugs, and follow the recommended replacement interval and torque/gap procedures for best results.