Denso 3068 Spark Plug

Denso 3068 U-Groove Spark Plug

The Denso 3068 spark plug is a conventional ignition component built with a U-groove ground electrode to improve ignitability and support more efficient combustion. It is a practical choice for drivers searching for a Denso spark plug 3068 replacement with OE-style construction and consistent secondary ignition performance.

Key Features

• U-groove ground electrode tip design for improved spark exposure
• Nickel ground electrode tip with a nickel center electrode tip
• Copper center electrode core for stable conductivity
• Standard ground configuration with a flat seat
• Pre-gapped to 0.7 mm for straightforward setup
• 14.00 mm thread diameter and 12.70 mm reach
• 20.6 mm hex size for proper socket fit
• Manufacturer heat range 20

Product Details

This Denso U-Groove Conventional spark plug is engineered for drivers who want a direct-fit ignition service part with a focus on reliable spark delivery. The U-groove electrode shape increases the spark path exposure, which helps the plug fire more consistently under normal operating conditions. For shoppers comparing Denso 3068 and DENSO Auto Parts W20FP-U, this part cross-references DENSO Auto Parts (e.g., W20FP-U) for the same application.

Use this spark plug when servicing ignition systems on vehicles such as Honda Civic and Toyota Corolla applications that call for the specified thread diameter, reach, seat type, and heat range. The Denso 3068 is built for routine maintenance where correct fitment and stable ignition performance matter.

What It Helps Address

• Hard starting caused by worn or inefficient spark plugs
• Rough idle from inconsistent ignition firing
• Misfire symptoms related to degraded plug electrodes
• Reduced combustion efficiency from excessive plug wear
• Service intervals where OE-style spark plug replacement is required

Installation Notes and Tips

Verify the engine calls for a 14.00 mm thread diameter, 12.70 mm reach, flat seat, and 20.6 mm hex size before installation. Check the pre-gap against the vehicle service specification before use, and confirm the ignition system is in good condition to avoid repeat misfire concerns. For Honda Civic and Toyota Corolla maintenance, match the plug heat range and seat style to the engine specification listed by the vehicle manufacturer.

Quality Assurance

Denso is known for OE-level ignition component engineering, and the U-Groove Conventional line focuses on dependable spark plug construction for everyday service work. The Denso 3068 is built to the listed specifications for accurate fitment and consistent ignition performance.