Description

NGK 5266 IZFR6K-11S Laser Iridium Spark Plug – Specifications & Applications

 

 

The NGK IZFR6K-11S (part number 5266) is a Laser Iridium spark plug, known for its durability, consistent performance, and long service life. Here’s a detailed breakdown of its specifications, applications, and the vehicle models that use it:

 

Specifications:

• Part Number: NGK 5266

• Stock Number: 5266

• Plug Type: Laser Iridium

• Thread Size: 14mm

• Thread Pitch: 1.25 mm

• Reach: 26.5 mm (1.04″)

• Hex Size: 5/8″ (16 mm)

• Seat Type: Gasket

• Heat Range: 6 (NGK’s heat scale; mid-range)

• Gap: 1.1 mm (0.043″)

• Center Electrode: Fine-wire Iridium

• Ground Electrode: Platinum-tipped

• Resistor Plug: Yes

• Terminal Type: Solid

 Features:

• Laser-welded Iridium tip for high durability

• Platinum pad on the ground electrode for extended lifespan

• Trivalent metal plating for anti-corrosion and anti-seizing properties

• Excellent ignitability and stable combustion

• OEM approved and widely used in modern vehicles

Applications — Vehicle Compatibility:

The NGK IZFR6K-11S 5266 is widely used in various Honda and Acura models and select other makes. Here are some notable vehicles that use this spark plug (always verify with VIN or service manual before replacing):

Honda:

• Honda Accord (2003–2012) — 2.4L 4-cylinder (K24A/K24Z engines)

• Honda CR-V (2002–2011) — 2.4L 4-cylinder

• Honda Element (2003–2011) — 2.4L

• Honda Civic Si (2002–2005) — 2.0L (K20A3)

• Honda Civic (2006–2011) — 2.0L/1.8L (varies by trim and market)

• Honda Odyssey (2005–2010) — 3.5L V6 (some trims; verify heat range)

• Honda Pilot (2003–2008) — 3.5L V6 (some versions)

• Honda Fit/Jazz (select markets)

Acura:

• Acura TSX (2004–2014) — 2.4L

• Acura RSX (2002–2006) — 2.0L (K20A3, K20Z1)

• Acura RDX (2007–2012) — 2.3L Turbo (K23A1)

• Acura TL (2004–2008) — 3.2L/3.5L (select trims)

Others (less common):

• Some Fiat and Alfa Romeo models in Europe (rebadged versions)

• Occasionally used in Mazda or Subaru turbo models (with modification)