Denso 3114 Spark Plug

Denso Double Platinum Spark Plug 3114

Denso Double Platinum spark plug 3114 is built for OE-style ignition performance, durability, and emissions control. It is a direct-fit spark plug for a wide range of Asian and domestic applications, including Honda Civic, Hyundai Sonata, and Mitsubishi Montero coverage.

The Double Platinum line uses platinum on the center electrode tip and a platinum chip on the ground electrode tip for stable spark delivery and longer service life. With a 5000 ohm resistor, 1.1 mm pre-gap, flat seat, 14.00 mm thread diameter, 19.00 mm reach, and 20.6 mm hex size, this plug is engineered to match factory-style specifications. Denso part number 3114 is also cross-referenced as DENSO Auto Parts P16PR11 for the same application.

Key Features

• Double Platinum design with platinum center electrode tip and platinum chip ground tip
• 5000 ohm resistor for ignition noise suppression
• Pre-gapped to 1.1 mm for factory-style setup
• Copper center electrode core and nickel ground electrode core
• Flat seat, 14.00 mm thread diameter, 19.00 mm reach
• OE-focused construction for emissions, durability, and performance standards

Product Details

Denso 3114 is a secondary ignition spark plug designed around OE dimensions and materials for consistent combustion performance. The Double Platinum construction supports long-term electrode stability, while the specified heat range 16 helps maintain the intended operating temperature in the applications listed. This spark plug is used across fitments such as 2001-2006 Kia Optima, 2002-2004 Hyundai Santa Fe, 2002-2004 Hyundai Sonata, 1997-1999 Mitsubishi 3000GT, and 1989-1994 Mitsubishi Montero.

Additional fitment coverage includes 1984-1986 Honda Civic, 1984 Honda Accord, 1985-1988 Nissan Sentra, 1987-1988 Nissan Pulsar NX, 1990-1993 Mazda B2200, and 1978-1980 Dodge Challenger. If you are searching for a Denso 3114 spark plug for Hyundai Sonata, Mitsubishi Montero, or Honda Civic service, this part matches the listed OE-style applications.

What It Helps Fix

• Rough idle caused by worn or fouled spark plugs
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to electrode wear
• Reduced fuel economy from incomplete combustion
• Ignition noise concerns addressed by the resistor design

Installation Notes

Verify thread diameter, reach, seat type, and heat range against the vehicle service specification before installation. Check the pre-gap against the engine requirement and adjust only if the application calls for it. Use proper spark plug socket clearance for the 20.6 mm hex and install to the manufacturer’s torque specification. For fitment confirmation, match the vehicle exactly to the listed year, make, and model, such as 2001-2006 Kia Optima, 2002-2004 Hyundai Sonata, or 1984-1986 Honda Civic.

Quality Assurance

Denso manufactures this spark plug to OE performance, durability, and emissions standards. The Double Platinum line is built for factory-style fitment and consistent ignition service across the listed applications.