Denso 4096 Spark Plug

Denso 4096 U-Groove Spark Plug

Denso 4096 is a conventional spark plug built around a U-groove ground electrode design for improved ignitability and more consistent combustion. It uses a copper center electrode core with nickel tip materials and a 5,000-ohm resistor for stable secondary ignition performance.

For drivers searching for a Denso 4096 spark plug for ignition service, this part is a direct-fit style option for applications that call for a 12.0 mm thread diameter, 19.00 mm reach, flat seat, and 0.9 pre-gap.

Key Features

• U-groove ground electrode tip design for stronger spark exposure
• Conventional spark plug construction for secondary ignition service
• Copper center electrode core for efficient current transfer
• Nickel center and ground electrode tip materials
• 5,000-ohm resistance for controlled electrical performance
• 18.0 mm hex size, 12.00 mm thread diameter, 19.00 mm reach, flat seat
• Manufacturer heat range 24 with a 0.9 pre-gap

Product Details

The Denso U-Groove Conventional line focuses on ignition efficiency through electrode geometry rather than complex add-ons. On this Denso 4096 spark plug, the U-shaped ground electrode helps expose the spark kernel more effectively, which supports cleaner combustion in properly matched engines. The nickel and copper material combination is selected for dependable conductivity and standard service use.

This part cross-references DENSO Auto Parts X24EPR-U9 for the same application. It is a practical choice for ignition maintenance on vehicles such as Honda Civic and Toyota Corolla when the engine specification calls for this exact plug design and dimensions.

Common Symptoms It Can Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from weak or inconsistent spark output
• Misfire conditions tied to ignition wear
• Reduced fuel efficiency from degraded combustion
• Sluggish throttle response from aged secondary ignition components

Installation Notes

Verify thread diameter, reach, seat type, heat range, and pre-gap against the vehicle service specification before installation. Use the correct torque procedure for the cylinder head material, and inspect ignition wires or coil-on-plug components at the same time to avoid repeat misfire concerns. For fitment-based searches, this Denso 4096 spark plug is the type of part commonly selected when servicing Honda Civic and Toyota Corolla ignition systems that specify these dimensions.

Quality Assurance

Denso designs this spark plug for conventional ignition service with defined electrical and dimensional specifications. The part number 4096 is also identified by Denso Auto Parts cross-reference X24EPR-U9, helping confirm application matching during parts lookup.