Denso 4130 Spark Plug

Denso 4130 U-Groove Conventional Spark Plug

Denso 4130 is a conventional spark plug built with an OEM-specified special ground electrode configuration for precise ignition performance. It uses a copper center electrode core, nickel center electrode tip, and a nickel ground electrode design to support stable spark delivery in secondary ignition systems.

The Denso U-Groove Conventional line focuses on OE-style construction and consistent electrode geometry. For drivers searching for a Denso 4130 spark plug or an OEM replacement spark plug for Honda Civic applications, this part is built around the specifications that matter most: heat range, gap, thread size, and seat type.

Key Features

• OEM-specified special ground electrode configuration
• Multi-electrode ground design with two ground electrodes
• Copper core center electrode for efficient heat transfer
• Nickel center and ground electrode tip materials
• 5000 ohm resistance for ignition system compatibility
• Pre-gapped to 0.7 mm
• Flat seat design
• 12.00 mm thread diameter, 19.00 mm reach, and 18.0 mm hex size
• Manufacturer heat range 27

Detailed Description

Denso 4130 is a U-Groove Conventional spark plug engineered for secondary ignition service where OE-style electrode layout and consistent firing characteristics are important. The multi-electrode ground configuration and nickel electrode materials support reliable spark exposure, while the copper core helps manage heat transfer through the plug body. This part cross-references DENSO Auto Parts X27ETR for the same application.

For Honda Civic ignition service and other applications that call for this specification set, Denso 4130 provides the correct combination of thread diameter, reach, seat type, resistance, and pre-gap size. If you are replacing worn plugs in a Honda Civic or sourcing a Denso 4130 replacement spark plug, matching these dimensions is essential for proper cylinder head fitment and ignition performance.

What This Spark Plug Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Misfire conditions related to electrode wear
• Rough idle from degraded ignition output
• Reduced combustion efficiency from incorrect plug heat range or gap
• Ignition performance issues in secondary ignition service

Installation Notes and Tips

Verify thread diameter, reach, seat type, heat range, and pre-gap before installation. Use the specified torque procedure for the cylinder head material and confirm the ignition system is in good condition before final assembly. For Honda Civic fitment searches, compare the vehicle’s original plug specification to Denso 4130 before installation.

Quality Assurance

Denso is an OE-focused ignition supplier, and the U-Groove Conventional line is built around factory-style electrode design and dimensional accuracy. This part is intended for applications that require the listed specifications, including Denso 4130 and Honda Civic ignition service where the OE-style plug format is specified.