Denso 3046 Spark Plug

Denso 3046 Spark Plug for OE-Style Ignition Service

The Denso 3046 spark plug is a conventional ignition component built around an OEM-specified special ground electrode configuration. It uses a copper core center electrode with nickel tip materials and a nickel ground electrode to support stable secondary ignition performance in the vehicles listed below.

As part of the Denso U-Groove Conventional line, this spark plug is aimed at applications that call for a standard-gap, OE-style design with a semi-surface ground configuration. It is a direct-fit choice for select Mitsubishi and Dodge models, including Ram 50, Mighty Max, Starion, Colt, Cordia, Tredia, and Power Ram 50 applications.

Key Features

• Denso 3046 spark plug for secondary ignition service
• U-Groove Conventional design with OEM-specified ground electrode configuration
• Copper core center electrode for consistent heat transfer
• Nickel center and ground electrode tip materials
• 5000 ohm resistance
• Pre-gapped at 1.1 mm
• Flat seat, 14.00 mm thread diameter, 19.00 mm reach
• Compatible with select Mitsubishi and Dodge vehicles from 1981-1989

Product Details

The Denso U-Groove Conventional line focuses on OE-style spark plug construction for engines that require a specific ground electrode shape and standard ignition characteristics. Part number 3046 uses a semi-surface ground configuration, a single ground electrode, and a 20.6 mm hex size for serviceability. The copper core center electrode and nickel electrode materials support dependable spark delivery in the listed applications. Cross-reference part numbers include Denso Auto Parts W20EPR-S11 and Mitsubishi MS851029.

Vehicle Fitment

• Fits 1984-1989 Dodge Ram 50, N/A
• Fits 1984-1989 Mitsubishi Mighty Max, N/A
• Fits 1985-1989 Mitsubishi Starion, N/A
• Fits 1983 Mitsubishi Starion, N/A
• Fits 1981-1988 Dodge Colt, N/A
• Fits 1983-1988 Mitsubishi Cordia, N/A
• Fits 1983-1988 Mitsubishi Tredia, N/A
• Fits 1984 Dodge Power Ram 50, N/A

Common Replacement Reasons

• Engine misfire or rough idle
• Hard starting or inconsistent ignition response
• Worn or fouled spark plug electrodes
• Loss of fuel efficiency caused by degraded spark performance
• Service replacement for OE-style ignition maintenance

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. The plug is pre-gapped at 1.1 mm, but the gap should still be checked against the engine specification before use. Confirm the vehicle application by year, make, and model, especially on Mitsubishi and Dodge Ram 50, Mighty Max, and Starion platforms.

Quality Assurance

This spark plug follows Denso’s OE-oriented conventional plug design and uses materials selected for standard ignition service in the specified applications. Part number 3046 is built to match the listed fitment and interchange references for direct replacement use.