Denso 3172 Spark Plug

Denso Double Platinum Spark Plug 3172

Denso Double Platinum Spark Plug 3172 is built for OE-style ignition performance in select Acura and Honda applications. It uses a platinum chip ground electrode, a platinum center electrode tip, and a copper core center electrode to support consistent spark delivery and long service life.

Key Features

• Double Platinum design for stable ignition performance
• Platinum chip ground electrode tip with standard ground configuration
• Platinum center electrode tip over a copper core center electrode
• 5000 ohm resistance for controlled electrical performance
• Pre-gapped to 1.3 mm for the specified application
• Flat seat, 14.00 mm thread diameter, 19.00 mm reach, and 16.0 mm hex size
• Manufactured to meet strict OE performance, durability, and emissions standards

Product Details

The Denso Double Platinum line is engineered for drivers who want an OE-style spark plug with durable electrode materials and precise fitment. Part number 3172 is designed around the factory-style specifications used in select Acura Integra, Honda Civic, and Honda Civic del Sol applications. This spark plug cross-references DENSO Auto Parts PK20PR-L13 and Honda 98079-56A-5H, 98079-56A-7H, 98079-56A-7S for the same application.

Fits 1992-2001 Acura Integra, N/A. Fits 1999-2000 Honda Civic, N/A. Fits 1994-1997 Honda Civic del Sol, N/A.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition output
• Misfire conditions related to degraded plug performance
• Reduced throttle response from weak spark delivery
• Maintenance replacement for OE-style ignition service

Installation Notes and Tips

Verify engine application, thread diameter, reach, seat type, and heat range before installation. Confirm the pre-gap specification matches the vehicle’s requirements and inspect ignition components for wear before replacing the plugs. Use the vehicle service manual for torque and service procedures.

Quality Assurance

Denso manufactures this spark plug to strict OE performance, durability, and emissions standards, supporting consistent operation in the specified Acura and Honda applications.