NGK Iridium Spark Plugs 6-Pack — IZFR5K11 OEM Fit for 3.5L V6, 0.044" Gap

NGK 3657 (IZFR5K11) Laser Iridium spark plugs are a six-pack of OEM-grade ignition parts engineered to deliver consistent firing, long life, and direct fit for many 3.5L V6 Honda, Acura and Saturn engines.

These NGK iridium plugs are specified to the original equipment gap of 0.044" and match OE design for a straightforward replacement in compatible 3.5L V6 vehicles. Built by one of the world’s leading spark plug manufacturers, the NGK IZFR5K11 combines a fine iridium center electrode with a robust construction to resist wear and maintain stable performance across typical driving conditions.

Which vehicles and model years are compatible?

These plugs are listed to fit multiple Honda and Acura models and several Saturn Vue model years with the 3.5L V6 engine. Always cross-check your engine code and OEM part number before purchasing to confirm fitment.

• Acura MDX: 2003–2006 (3.5L V6) — specified gap 0.044"
• Honda Odyssey: 2005–2010 (3.5L V6) — specified gap 0.044"
• Honda Pilot: 2006–2008 (3.5L V6) — specified gap 0.044"
• Honda Ridgeline: 2006–2007 (3.5L V6) — specified gap 0.044"
• Saturn Vue: 2004–2007 (3.5L V6) — OE-equivalent 0.044" gap

How do these NGK iridium plugs affect performance and longevity?

Iridium is a very hard, wear-resistant metal that helps the center electrode retain its shape and gap over many miles. That means more reliable ignitions, improved throttle response, and a longer service interval compared with standard copper plugs.

• Fine iridium tip for stable spark and slow electrode erosion
• Durable construction resists fouling under normal driving
• Maintains factory-specified 0.044" gap for consistent combustion
• Sold in a pack of six for complete V6 replacement

What should I know about installation and maintenance?

Installation is straightforward for anyone comfortable removing and replacing spark plugs, but follow torque specs and electrode gap checks. Using a torque wrench and anti-seize recommendations from NGK or your vehicle maker helps prevent over-tightening and ensures proper seating.

• Confirm engine type and plug socket access before starting
• Torque to manufacturer specification; re-gap only if necessary
• Replace all six plugs on a V6 to keep firing uniform
• Inspect ignition boots and coils while plugs are out

Why choose NGK over generic spark plugs?

NGK is a leading OEM supplier with decades of production experience and strict quality controls. Choosing NGK reduces the risk of premature wear and ensures the plug geometry and materials match factory expectations for many vehicles.

• World’s largest original equipment spark plug supplier
• Manufactured to match OE specifications and gap settings
• Designed for durability and predictable replacement intervals
• Sold in vehicle-appropriate six-pack quantity for V6 engines

Who is this for: Drivers and DIY mechanics who own compatible Honda, Acura, or Saturn 3.5L V6 vehicles and want an OEM-equivalent replacement with improved wear resistance. This six-pack is ideal for routine maintenance, restoring ignition consistency, or upgrading from worn factory plugs to an iridium long-life option.

• Features:
  • Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity.
  • Offering the Quality, Reliability and Durability You'd Expect from an OEM Manufacturer
  • NGK is the world's largest supplier of OEM spark plugs
  • Research Applications Prior to Purchase To Make Sure This OEM Part Fits Your Vehicle, Including Engine, Drivetrain and Quantity Needed.
  • This Listing is for 6 Spark Plugs