Denso 3093 Spark Plug

Denso 3093 U-Groove Spark Plug

The Denso 3093 is a conventional spark plug built around a U-Groove ground electrode design for improved ignitability and more consistent combustion. It is a practical choice for drivers searching for a Denso spark plug 3093 replacement with OE-style dimensions and a copper core center electrode.

U-Groove Conventional Design

• U-Groove ground electrode tip design for stronger spark exposure
• Nickel ground electrode tip and nickel center electrode tip
• Copper center electrode core for stable heat transfer
• Standard ground configuration with one ground electrode
• Pre-gapped to 0.8 mm
• 14.00 mm thread diameter, 19.00 mm reach, flat seat
• 20.6 mm hex size and manufacturer heat range 22

Detailed Product Overview

As part of Denso’s U-Groove Conventional line, this spark plug focuses on dependable ignition performance in a straightforward OE-style format. The U-shaped ground electrode helps expose the spark kernel more effectively, which supports cleaner combustion and efficient engine operation. For shoppers comparing Denso 3093 and W22ES-U spark plug options, this part number is the direct reference for the same application.

Drivers searching for a Denso 3093 spark plug for Honda and other import applications often look for a conventional plug with the correct thread diameter, reach, and seat type. The copper core and nickel electrode materials provide a familiar serviceable design for routine ignition maintenance.

Common Symptoms This Part Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark delivery
• Misfire conditions related to degraded secondary ignition components
• Reduced fuel efficiency from incomplete combustion
• Loss of throttle response from aged ignition parts

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. Use the specified gap setting if your application requires a final check, even though this plug is pre-gapped to 0.8 mm. Confirm the correct torque procedure for the cylinder head material and inspect ignition wires or coils at the same time to avoid repeat service.

Compatible With select Honda Civic applications where the OE specification calls for this plug style, and with other vehicles that match the listed dimensions and heat range. This part cross-references DENSO Auto Parts (e.g., W22ES-U) for the same application.

Quality Assurance

Denso manufactures ignition components to OE-level dimensional standards, and the U-Groove Conventional line is built for consistent fit and repeatable spark performance in standard service use.