Denso 5348 Spark Plug

Denso Iridium Power Spark Plug 5348

Denso Iridium Power spark plug 5348 is built for drivers who want precise ignition performance and stable combustion response. It uses a 0.4 mm iridium center electrode, a copper core center electrode, and a nickel ground electrode to support consistent spark delivery in demanding street and performance applications.

Key Features

• Iridium center electrode tip material with a 0.4 mm fine-wire design
• Tapercut and U-groove ground electrode tip design for focused spark exposure
• 5000 resistance specification for ignition system compatibility
• Pre-gapped to 0.8 mm
• 14.00 mm thread diameter, 19.00 mm reach, and flat seat type
• 16.0 mm hex size for standard service tool access
• Manufacturer heat range 22

Product Details

The Denso Iridium Power line is engineered around a small-diameter iridium center electrode to concentrate ignition energy and promote efficient flame initiation. Part number 5348 combines that fine-wire design with a copper core center electrode and a nickel ground electrode for dependable heat transfer and stable operation. This spark plug is a direct service choice for select Honda Civic, Honda S2000, Acura RSX, and Acura NSX applications, including 2006-2011 Honda Civic, 2000-2009 Honda S2000, 2002-2006 Acura RSX, and 1991-1993 Acura NSX. This part cross-references DENSO Auto Parts IK22G for the same application.

Common Issues This Part Can Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire conditions related to degraded electrode performance
• Rough idle from weak ignition output
• Reduced throttle response from inefficient combustion
• Service intervals affected by plug wear and electrode erosion

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. Confirm the gap specification against the vehicle service information and inspect ignition coils, boots, and plug wells for wear or contamination. Use proper torque procedures for the cylinder head material and application. Compatible With 2006-2011 Honda Civic, 2000-2009 Honda S2000, 2002-2006 Acura RSX, and 1991-1993 Acura NSX as listed in the fitment data.

Quality Assurance

Denso manufactures this Iridium Power spark plug to published dimensional and material specifications, including iridium center electrode tip material, nickel ground electrode construction, and the stated heat range and resistance values. Part number 5348 is built for consistent service in the confirmed Honda and Acura applications above.