Denso 3141 Spark Plug

Denso Double Platinum Spark Plug 3141

Denso Double Platinum 3141 is a spark plug built for OE-style ignition performance, durability, and emissions control. It uses a platinum center electrode and a double platinum chip ground design to support consistent spark delivery in demanding street applications.

Compatible with select Porsche 911, Mitsubishi 3000GT, Mitsubishi Montero Sport, Dodge Stealth, Mitsubishi Montero, and Mitsubishi Diamante applications, this plug is a direct-fit option for drivers searching for a Denso 3141 spark plug for factory-style maintenance.

Key Features

• Double Platinum Chip ground electrode tip design for stable wear characteristics
• Platinum center electrode tip with copper core for efficient ignition transfer
• Nickel ground electrode core material for dependable construction
• 5000 ohm resistance for ignition system noise control
• Flat seat design with 14.00 mm thread diameter and 19.00 mm reach
• Pre-gapped to 1.1 mm for straightforward service replacement
• 16.0 mm hex size and Manufacturer Heat Range 20

Product Details

Denso Double Platinum is a product line focused on OE-level fit and long-term service consistency. Part number 3141 is manufactured to meet strict original-equipment standards for performance, durability, and emissions, making it a practical choice for maintenance on vehicles that call for this plug specification. This part cross-references DENSO Auto Parts PK20PR-P11 for the same application.

Vehicle-specific fitment includes Fits 2011 Porsche 911, N/A; Fits 2007-2009 Porsche 911, N/A; Fits 1991-1999 Mitsubishi 3000GT, N/A; Fits 1997-1998 Mitsubishi Montero Sport, N/A; Fits 1991-1996 Dodge Stealth, N/A; Fits 1995-1996 Mitsubishi Montero, N/A; Fits 1992-1995 Mitsubishi Diamante, N/A. The Denso 3141 spark plug is also referenced by select OEM numbers for Nissan, Mitsubishi, and Porsche applications.

What It Helps Address

• Misfires caused by worn or inconsistent spark plugs
• Hard starting related to degraded ignition performance
• Rough idle from weak spark delivery
• Reduced fuel economy from inefficient combustion
• Emissions issues tied to aging secondary ignition components

Installation Notes

Verify thread diameter, reach, seat type, and heat range against the vehicle service specification before installation. Check the pre-gap setting against the engine requirement and inspect ignition wires or coils for wear before replacing plugs. Use proper torque procedures to protect the cylinder head and ensure correct sealing on the flat seat design.

Quality Assurance

Denso manufactures this spark plug to OE performance, durability, and emissions standards. The Double Platinum construction is intended to support consistent service life in factory-style ignition systems.