Denso 3119 Spark Plug

Denso 3119 U-Groove Spark Plug

Denso 3119 is a conventional spark plug built for steady ignition performance in a wide range of import and domestic applications. Its U-Groove ground electrode design helps improve ignitability for more efficient combustion, making it a practical choice for drivers servicing older Toyota, Nissan, and Chevrolet platforms.

Key Features

• U-Groove ground electrode tip design for improved ignitability
• 5000 ohm resistor for noise suppression in the ignition system
• Copper center electrode core for reliable heat transfer
• Nickel center and ground electrode tip materials
• Standard ground configuration with a flat seat
• Pre-gapped to 0.8 mm
• 14.00 mm thread diameter, 19.00 mm reach, 16.0 mm hex size
• Manufacturer heat range 16

Product Details

The Denso U-Groove Conventional line focuses on dependable secondary ignition performance with a design that promotes a stronger spark kernel. On this Denso 3119 spark plug, the U-shaped ground electrode helps expose more of the air-fuel mixture to the spark, supporting cleaner ignition in engines that call for a conventional plug design. This part cross-references DENSO Auto Parts K16R-U for the same application.

Compatible With applications such as 2001-2005 Toyota Echo, 1995-2000 Toyota Tacoma, 1993-1997 Toyota Corolla, 1990-1995 Nissan Pathfinder, and 1998-1999 Chevrolet Prizm. It also appears in fitment for 2004-2006 Scion xA and xB, 2004-2005 Mazda Miata, and 1996-1997 Lexus LX450, along with additional Toyota, Nissan, Geo, Chevrolet, Rolls-Royce, and Audi coverage listed in the fitment data.

Common Uses

• Rough idle caused by worn or fouled spark plugs
• Hard starting from weak ignition output
• Misfire conditions related to aged secondary ignition components
• Reduced fuel efficiency from inconsistent spark delivery
• Maintenance replacement for conventional ignition service intervals

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. The plug is supplied with a 0.8 mm pre-gap, but final gap should always be checked against the vehicle service specification. Use proper torque procedures for the 14.00 mm flat-seat design to help prevent thread damage and ensure correct heat transfer.

Quality Assurance

Denso manufactures this spark plug as part of its U-Groove Conventional product line, using nickel and copper electrode materials for consistent ignition service in the specified applications. Confirm vehicle fitment by year, make, and model before ordering.