Denso 3374 Spark Plug

Denso 3374 Spark Plug for Honda and Acura

Denso 3374 is a U-Groove conventional spark plug built to OEM quality standards for select Honda and Acura applications. It uses a copper core center electrode, nickel tip materials, and a 5,000-ohm resistor to support stable ignition performance in daily-driven engines.

The Denso U-Groove Conventional line focuses on dependable OE-style ignition service for vehicles such as the Honda Civic, Honda CR-V, and Acura TL. Part number 3374 is specified for a wide range of 2002-2014 Honda and Acura models, including the Honda Fit and Acura TSX.

Key Features

• U-Groove conventional spark plug design
• Manufactured to OEM quality standards
• 5,000-ohm resistor for ignition circuit control
• Copper center electrode core for consistent conductivity
• Nickel center and ground electrode tip materials
• Standard ground electrode tip design with thick electrode configuration
• Pre-gapped to 1.1 mm
• 14.00 mm thread diameter, 19.00 mm reach, flat seat, 16.0 mm hex
• Manufacturer heat range 20

Detailed Description

Denso 3374 is a conventional spark plug engineered for OE-style replacement in compatible Honda and Acura engines. Its U-groove ground electrode design, copper core center electrode, and nickel electrode materials are selected to support reliable spark delivery and steady combustion characteristics. This part cross-references DENSO Auto Parts KJ20DR-M11 for the same application.

Compatible With 2007-2014 Honda Fit, N/A; 2002-2011 Honda Civic, N/A; 2003-2011 Honda Element, N/A; 2007-2009 Acura MDX, N/A; 2002-2009 Honda CR-V, N/A; 2005-2008 Acura RL, N/A; 2004-2008 Acura TL, N/A; 2004-2008 Acura TSX, N/A; 2003-2007 Honda Accord, N/A; 2002-2006 Acura RSX, N/A. Use Denso 3374 when servicing ignition systems that call for this plug specification on Honda Civic, Honda CR-V, and related Acura models.

What It Is Used For

• Replacing worn spark plugs that cause rough idle
• Restoring ignition performance after misfire codes
• Addressing hard starting on Honda and Acura engines
• Improving combustion consistency when plugs are fouled or worn
• Maintaining OE-style service intervals on compatible vehicles

Installation Notes and Tips

Verify the engine application against the vehicle service information before installation. Confirm the specified gap, thread reach, seat type, and hex size match the original plug requirement. Inspect ignition coils, boots, and plug wells during service, and torque the plug to the manufacturer specification for the engine.

Quality Assurance

Denso manufactures this spark plug to OEM quality standards for consistent fit and service performance in the listed applications. The U-Groove Conventional design is part of Denso's OE-style ignition lineup for Honda and Acura vehicles.